Huawei MU609 User guide

HUAWEI MU609 HSPA LGA Module
Application Guide
Issue
02
Date
2013-09-18

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HUAWEI MU609 HSPA LGA Module
Application Guide
About This Document
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Huawei Proprietary and Confidential
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3
About This Document
Revision History
Document
Version
Date
Chapter
Descriptions
01
2013-07-18
Creation
02
2013-09-18
1.3
Updated USB Port description
All
Deleted MSA Positioning Using the User
Plane Protocol in issue 01
19.3
Added section 19.3 Exception Handling

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Contents
1 Overview.......................................................................................................................................11
1.1 Conventions and Definitions ...........................................................................................................11
1.1.1 Conventions............................................................................................................................11
1.1.2 Definitions...............................................................................................................................11
1.2 Organization of This Document...................................................................................................... 12
1.3 Basic AT Command Processing Principles .................................................................................... 13
1.3.1 Ports ...................................................................................................................................... 13
1.3.2 AT Command Processing Mechanism................................................................................... 14
1.3.3 Recommended Timeout Mechanism for AT Commands Processed by a Host..................... 17
2 Initialization Application Scenarios .......................................................................................19
2.1 Startup Indication ^SYSSTART...................................................................................................... 19
2.1.1 Reference Process................................................................................................................ 19
2.1.2 Troubleshooting..................................................................................................................... 19
2.2 Querying Basic Information............................................................................................................ 20
2.2.1 Reference Process................................................................................................................ 20
2.2.2 Troubleshooting..................................................................................................................... 20
2.3 Network Service Operations .......................................................................................................... 21
2.3.1 Reference Process................................................................................................................ 21
2.3.2 Troubleshooting..................................................................................................................... 22
3 Serial Port Configuration Application Scenarios .................................................................23
3.1 Baud Rate Configuration................................................................................................................ 23
3.1.1 Reference Process................................................................................................................ 23
3.1.2 Troubleshooting..................................................................................................................... 23
3.2 DTR Hang Up Data Services ......................................................................................................... 24
3.2.1 Reference Process................................................................................................................ 24
3.2.2 Troubleshooting..................................................................................................................... 24
3.3 DCD Pin Control............................................................................................................................. 24
3.3.1 Reference Process................................................................................................................ 24
3.3.2 Troubleshooting..................................................................................................................... 25
3.4 Setting Hardware Flow Control ...................................................................................................... 25
3.4.1 Reference Process................................................................................................................ 25
3.4.2 Troubleshooting..................................................................................................................... 25

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4 External Protocol Stack Application Scenarios .....................................................................26
4.1 Prerequisites .................................................................................................................................. 26
4.1.1 Reference Process................................................................................................................ 26
4.1.2 Troubleshooting..................................................................................................................... 27
4.2 Establishing Data Connections ...................................................................................................... 27
4.2.1 Troubleshooting..................................................................................................................... 28
4.3 Data Transmission.......................................................................................................................... 28
4.4 Switch Between Data Mode and Command Mode ........................................................................ 30
4.4.1 Reference Process................................................................................................................ 30
4.4.2 Troubleshooting..................................................................................................................... 31
4.5 Disconnecting Data Service Connections...................................................................................... 31
4.5.1 Reference Process................................................................................................................ 31
5 Internal Protocol Stack Application Scenarios......................................................................33
5.1 Initializing Internet Services ........................................................................................................... 33
5.1.1 Reference Process................................................................................................................ 33
5.1.2 Troubleshooting..................................................................................................................... 34
5.2 Creating a Listen Server ................................................................................................................ 34
5.2.1 Reference Process................................................................................................................ 34
5.2.2 Troubleshooting..................................................................................................................... 35
5.3 Creating TCP/UDP Links................................................................................................................ 35
5.3.1 Reference Process................................................................................................................ 35
5.3.2 Troubleshooting..................................................................................................................... 36
5.4 Sending Data.................................................................................................................................. 37
5.4.1 Reference Process................................................................................................................ 37
5.4.2 Troubleshooting..................................................................................................................... 38
5.5 Closing TCP/UDP Links................................................................................................................. 38
5.5.1 Reference Process................................................................................................................ 38
5.5.2 Troubleshooting..................................................................................................................... 39
5.6 Transparent Transmission Mode.................................................................................................... 39
5.6.1 Reference Process................................................................................................................ 39
5.6.2 Troubleshooting..................................................................................................................... 41
5.7 Packet Statistics............................................................................................................................. 42
5.7.1 Reference Process................................................................................................................ 42
5.8 TCP/UDP Link Change Indication.................................................................................................. 42
5.8.1 Reference Process................................................................................................................ 42
6 Voice and Supplementary Service Application Scenarios .................................................44
6.1 Pre-configuration (PCM Voice Pre-configuration).......................................................................... 44
6.1.1 Reference Process................................................................................................................ 44
6.2 Voice Call Initialization ................................................................................................................... 45
6.2.1 Reference Process................................................................................................................ 45
6.2.2 Troubleshooting..................................................................................................................... 45

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6.3 Voice Call Handling........................................................................................................................ 45
6.3.1 Reference Process................................................................................................................ 45
6.3.2 Troubleshooting..................................................................................................................... 46
6.4 DTMF Application........................................................................................................................... 46
6.4.1 Reference Process................................................................................................................ 46
6.4.2 Troubleshooting..................................................................................................................... 47
6.5 ID Presentation............................................................................................................................... 47
6.5.1 Reference Process................................................................................................................ 47
6.5.2 Troubleshooting..................................................................................................................... 49
6.6 Call Forwarding.............................................................................................................................. 50
6.6.1 Reference Process................................................................................................................ 50
6.6.2 Troubleshooting..................................................................................................................... 51
6.7 Multi-party Calling........................................................................................................................... 51
6.7.1 Reference Process................................................................................................................ 51
6.7.2 Troubleshooting..................................................................................................................... 55
6.8 Call Restriction............................................................................................................................... 56
6.8.1 Reference Process................................................................................................................ 56
6.8.2 Troubleshooting..................................................................................................................... 58
7 Text Message Application Scenarios.......................................................................................59
7.1 Pre-configuration (CPMS).............................................................................................................. 59
7.1.1 Reference Process................................................................................................................ 59
7.1.2 Troubleshooting..................................................................................................................... 60
7.2 Sending English Text Messages in PDU Format ........................................................................... 60
7.2.1 Reference Process................................................................................................................ 60
7.2.2 Troubleshooting..................................................................................................................... 61
7.3 Sending Chinese Character Text Messages in Text Format.......................................................... 61
7.3.1 Reference Process................................................................................................................ 61
7.3.2 Troubleshooting..................................................................................................................... 62
7.4 Receiving Text Messages............................................................................................................... 62
7.4.1 Reference Process................................................................................................................ 62
7.4.2 Troubleshooting..................................................................................................................... 64
7.5 Segmenting and Reassembling Long Text Messages................................................................... 64
7.5.1 Segmenting ........................................................................................................................... 64
7.5.2 Reassembling........................................................................................................................ 65
8 Phonebook Application Scenarios ..........................................................................................66
8.1 Memory Operations........................................................................................................................ 66
8.1.1 Reference Process................................................................................................................ 66
8.1.2 Troubleshooting..................................................................................................................... 66
8.2 Writing/Deleting Phonebook Entries .............................................................................................. 67
8.2.1 Reference Process................................................................................................................ 67
8.2.2 Troubleshooting..................................................................................................................... 67

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8.3 Reading Phonebook Entries .......................................................................................................... 68
8.3.1 Reference Process................................................................................................................ 68
8.3.2 Troubleshooting..................................................................................................................... 69
8.4 Searching for Phonebook Entries .................................................................................................. 70
8.4.1 Reference Process................................................................................................................ 70
8.4.2 Troubleshooting..................................................................................................................... 70
8.5 Querying User Number .................................................................................................................. 71
8.5.1 Reference Process................................................................................................................ 71
8.5.2 Troubleshooting..................................................................................................................... 71
8.6 Setting the TE's Character Sets..................................................................................................... 71
8.6.1 Reference Process................................................................................................................ 71
8.6.2 Troubleshooting..................................................................................................................... 72
9 SIM Operation Application Scenarios....................................................................................73
9.1 PIN Operations............................................................................................................................... 73
9.1.1 Reference Process................................................................................................................ 73
9.1.2 Troubleshooting..................................................................................................................... 73
9.2 CRSM Command........................................................................................................................... 74
9.2.1 Reference Process................................................................................................................ 74
9.2.2 Troubleshooting..................................................................................................................... 76
10 Sleeping and Waking Up Application Scenarios ...............................................................77
10.1 Hardware Interfaces..................................................................................................................... 78
10.2 Sequence Diagram ...................................................................................................................... 79
10.3 Software Interfaces ...................................................................................................................... 80
10.3.1 Principle............................................................................................................................... 80
10.3.2 USB and Sleep.................................................................................................................... 82
10.3.3 UART and Sleep.................................................................................................................. 82
10.3.4 Module Wake-up.................................................................................................................. 82
10.3.5 Host Woken up by Module .................................................................................................. 83
10.4 Application Scenarios: System with USB Connection only.......................................................... 84
10.4.1 Hardware Connection.......................................................................................................... 84
10.4.2 Software Procedure............................................................................................................. 84
10.4.3 Advantages.......................................................................................................................... 85
10.5 Application Scenarios: System with USB and WAKEUP_OUT.................................................... 85
10.5.1 Hardware Connection.......................................................................................................... 85
10.5.2 Software Procedure............................................................................................................. 86
10.5.3 Advantages.......................................................................................................................... 86
10.6 Application Scenarios: System with UART and WAKEUP_OUT ................................................. 87
10.6.1 Hardware Connection.......................................................................................................... 87
10.6.2 Software Procedure............................................................................................................. 87
10.6.3 Advantages.......................................................................................................................... 88
10.7 System with Other Connection Methods...................................................................................... 88

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11 Thermal Protection Application Scenarios ..........................................................................90
11.1 Pre-configuration .......................................................................................................................... 90
11.1.1 Troubleshooting ................................................................................................................... 90
11.2 Thermal Protection Process......................................................................................................... 90
12 GPS Application Scenarios .....................................................................................................92
12.1 Introduction to GPS...................................................................................................................... 92
12.1.1 GPS Positioning Methods ................................................................................................... 92
12.1.2 GPS Ports............................................................................................................................ 94
12.2 Standalone Positioning................................................................................................................. 95
12.3 MSB Positioning Using the User Plane Protocol ......................................................................... 96
12.4 XTRA Positioning ......................................................................................................................... 97
12.5 GNSS Positioning......................................................................................................................... 98
13 Concurrent Service Application Scenarios ........................................................................100
13.1 Voice Calls and Text Messaging ................................................................................................ 100
13.2 Internal/External Protocol Stacks and Text Messaging.............................................................. 101
13.3 Internal/External Protocol Stacks and Voice Calls..................................................................... 103
13.4 Other Services............................................................................................................................ 106
14 STK Application Scenarios ...................................................................................................107
14.1 Unsolicited Report of STK Proactive Commands...................................................................... 107
14.1.1 Reference Process............................................................................................................ 107
14.1.2 Troubleshooting................................................................................................................. 108
14.2 Querying the STK Main Menu.................................................................................................... 109
14.2.1 Reference Process............................................................................................................ 109
14.2.2 Troubleshooting..................................................................................................................110
14.3 STK Envelope Command............................................................................................................110
14.3.1 Reference Process.............................................................................................................110
14.3.2 Troubleshooting..................................................................................................................111
15 USSD Application Scenarios................................................................................................112
15.1 USSD Initialize and Configration.................................................................................................112
15.1.1 Reference Process.............................................................................................................112
15.1.2 Troubleshooting..................................................................................................................112
15.2 Send the USSD Command in non-Transparent Mode................................................................113
15.2.1 Reference Process.............................................................................................................113
15.2.2 Troubleshooting..................................................................................................................114
15.3 Send the USSD Command in Transparent Mode.......................................................................114
15.3.1 Reference Process.............................................................................................................114
15.3.2 Troubleshooting..................................................................................................................114
15.4 Network Initiated USSD Operation..............................................................................................115
15.4.1 Reference Process.............................................................................................................115
15.4.2 Troubleshooting..................................................................................................................115

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16 FOTA Application Scenarios................................................................................................116
16.1 FOTA Process .............................................................................................................................116
16.1.1 Upgrade Module Firmware Over Air Through Delta Package............................................116
16.1.2 Procedure for FOTA Implementation..................................................................................116
16.2 Setting FOTA Mode.....................................................................................................................119
16.2.1 Reference Process.............................................................................................................119
16.2.2 Troubleshooting..................................................................................................................119
16.3 Setting FOTA Connection Parameters....................................................................................... 120
16.3.1 Reference Process............................................................................................................ 120
16.3.2 Troubleshooting................................................................................................................. 120
16.4 Manually Querying for Upgrade Firmware Version.................................................................... 121
16.4.1 Reference Process............................................................................................................ 121
16.4.2 Troubleshooting................................................................................................................. 122
16.5 Periodically Querying the Version.............................................................................................. 123
16.5.1 Reference Process............................................................................................................ 123
16.5.2 Troubleshooting................................................................................................................. 124
16.6 Manually Downloading the Version............................................................................................ 124
16.6.1 Reference Process............................................................................................................ 124
16.6.2 Troubleshooting................................................................................................................. 125
16.7 Automatically Downloading the Firmware.................................................................................. 126
16.7.1 Reference Process............................................................................................................ 126
16.7.2 Troubleshooting................................................................................................................. 126
16.8 Using the Resumable Data Transfer Function........................................................................... 126
16.8.1 Reference Process............................................................................................................ 126
16.8.2 Troubleshooting................................................................................................................. 127
16.9 Manually Canceling the Download............................................................................................. 127
16.9.1 Reference Process............................................................................................................ 127
16.9.2 Troubleshooting................................................................................................................. 128
16.10 Manually Upgrading the Version.............................................................................................. 128
16.10.1 Reference Process.......................................................................................................... 128
16.10.2 Troubleshooting............................................................................................................... 129
16.11 Automatically Upgrading the Version........................................................................................ 129
16.11.1 Reference Process .......................................................................................................... 129
16.11.2 Troubleshooting ............................................................................................................... 130
17 ECM Application Scenarios..................................................................................................131
17.1 ECM Dialing ............................................................................................................................... 131
17.1.1 Reference Process............................................................................................................ 131
17.1.2 Troubleshooting................................................................................................................. 132
17.2 Querying the Dial-up Connection State...................................................................................... 132
17.2.1 Reference Process............................................................................................................ 132
17.2.2 Troubleshooting................................................................................................................. 133

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17.3 Disconnecting the Dial-up Connection....................................................................................... 133
17.3.1 Reference Process............................................................................................................ 133
17.3.2 Troubleshooting................................................................................................................. 133
18 Local Upgrade Application Scenarios.................................................................................134
18.1 Starting the Local Upgrade......................................................................................................... 134
18.1.1 Local Upgrade Flow Chart................................................................................................. 134
18.1.2 Test Steps.......................................................................................................................... 135
18.1.3 Reference Process............................................................................................................ 140
18.1.4 Troubleshooting................................................................................................................. 141
18.2 Reporting the Local Upgrade State............................................................................................ 141
18.2.1 Reference Process............................................................................................................ 141
18.2.2 Troubleshooting................................................................................................................. 141
19 Appendix ..................................................................................................................................142
19.1 Relative Documents................................................................................................................... 142
19.2 Acronyms and Abbreviations...................................................................................................... 142
19.3 Exception Handling .................................................................................................................... 144
19.3.1 Module Reset .................................................................................................................... 144
19.3.2 Module Going to Dump Status .......................................................................................... 144
19.3.3 Module Data Service Disconnected .................................................................................. 145
19.3.4 User Configuration Lost..................................................................................................... 145

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1 Overview
This document is intended to provide references for customers to choose appropriate
command sequences to start using the MU609 in a faster manner. This document
also contains examples and relevant description.
This document will be updated based on customers' requirements.
1.1 Conventions and Definitions
1.1.1 Conventions
Convention
Description
<…>
Value range of AT command parameters
XXXX
Personal Identification Number (PIN), Personal Unlock Key
(PUK), or password
1.1.2 Definitions
Term
Definition
Connected
Indicates that a link has been set up between two modules or a
module and a terminal.
Registered
Indicates that the module is registered with a UMTS/GSM
network.
Module
HUAWEI UMTS/GSM module

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Term
Definition
Application Mobileequipment
UMTS/GSM
network
1.2 Organization of This Document
Chapter
Description
Chapter 1 Overview
Describes the contents and organization of this
document
Chapter 2 Initialization
Application Scenarios
Describes scenarios for initialization
Chapter 3 Serial Port
Configuration Application
Scenarios
Describes scenarios for serial port
configuration
Chapter 4 External Protocol
Stack Application Scenarios
Describes scenarios for external protocol stack
Chapter 5 Internal Protocol Stack
Application Scenarios
Describes scenarios for internal protocol stack
Chapter 6 Voice and
Supplementary Service
Application Scenarios
Describes scenarios for voice and audio
service
Chapter 7 Text Message
Application Scenarios
Describes scenarios for the text message
Chapter 8 Phonebook
Application Scenarios
Describes scenarios for phonebook
Chapter 9 SIM Operation
Application Scenarios
Describes scenarios for PIN management
Chapter 10 Sleeping and Waking
Up Application Scenarios
Describes scenarios for power management
Chapter 11 Thermal Protection
Application Scenarios
Describes scenarios for thermal protection
Chapter 12 GPS Application
Scenarios
Describes scenarios for GPS

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Chapter
Description
Chapter13 Concurrent Service
Application Scenarios
Describes scenarios for concurrent service of
data service, audio and text
Chapter14 STK Application
Scenarios
Describes scenarios for STK
Chapter15 USSD Application
Scenarios
Describes scenarios for USSD
Chapter16 FOTA Application
Scenarios
Describes scenarios for FOTA
Chapter17 ECM Application
Scenarios
Describes scenarios for ECM
Chapter18 Local Upgrade
Application Scenarios
Describes scenarios for Local Upgrade
Chapter19 Appendix
Appendix
1.3 Basic AT Command Processing Principles
1.3.1 Ports
The MU609 supports two configurations with USB connection, and the second
configuration will be selected as the default configuration on Linux/Android OS.
Note:
The first configuration is reserved and not used currently.
The MU609 provides six ports to interact with USB connection as shown in Figure
1-1 .
The following steps show how to find the six ports.
Step 1 Execute dmesg command.
Step 2 Find the mapping details between the ttyUSBx and the USB port:

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Figure 1-1 Port sequence on Linux
ECM port: simulated using USB, for establishing communication connection.
This is eth2 in Figure 1-1 .
MODEM port: simulated using USB, forAT command interaction and
establishing data connection. This is ttyUSB0 in Figure 1-1 .
DIAG port: simulated using USB, for DIAG (diagnostic) command interaction
(mainly used to debug modules at present). This is ttyUSB1 in Figure 1-1 .
PCUI port: simulated using USB, forAT command interaction only. This is
ttyUSB2 in Figure 1-1 .
GPS NMEAport: simulated using USB, sending unsolicited indications for NMEA
positioning data only. This is ttyUSB3 in Figure 1-1 .
GPS Control port: simulated using USB, for GPSAT command interaction only.
This is ttyUSB4 in Figure 1-1 .
Note:
The number of ethx and ttyUSBx may be different between different operation systems, yet the
port sequence is the same as shown in Figure 1-1 .
The MU609 also provides a physical serial port:
UART port: physical serial port, forAT command interaction and establishing data
connection.
A host controls a module usingAT commands. IfAT commands are unavailable, a
module can be deemed unavailable.
1.3.2 AT Command Processing Mechanism
A module processesAT commands from the ports (MODEM, PCUI, Control, and
UART) in series. AnAT command can be processed when and only when the
previousAT command processing has been completed. If the module is processing
an AT command, most new AT commands from the same port will be ignored and
other commands from other ports will be buffered until the currentAT command is
processed.
This rule also applies to COM ports converted from USB ports.

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The processing of anAT command starts when theAT command is entered from the
TE, and ends when the UE (the module) returns all the results in response to the
command.
Figure 1-2 AT command processing sequence diagram
TE UE
AT command 1
AT command 2
Return results of AT command 1
AT command 3
Ignore AT
command 2
Process AT
command 1
Process AT
command 3
Return results of AT command 3

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Example:
AT
+
CPIN
?
+
CPIN
:
READY
OK
AT
+
CMGL
=
4
+
CMGL
:
0
,
3
,,
19
07813108608805
F
911320
B
813109730116
F
20000
A
705
B
3
D
84
C
4603
+
CMGL
:
1
,
2
,,
18
07813108608805
F
931
FF
0
B
813109730155
F
30000
A
704
F
4
F
29
C
0
E
+
CMGL
:
2
,
2
,,
18
07813108608805
F
931
FF
0
B
813109730155
F
30000
A
704
F
4
F
29
C
0
E
+
CMGL
:
3
,
2
,,
28
07813108608805
F
931
FF
0
B
813109730155
F
30000
A
71061
F
69
CAC
2
EBF
69
B
5
FA
4
D
36
CBC
168
+
CMGL
:
4
,
2
,,
24
07813108608805
F
931
FF
0
B
813109730155
F
30000
A
70
BB
05
C
2
D
5
DB
7
C
1
D
4
ECB
4
1
A
+
CMGL
:
5
,
2
,,
22
07813108608805
F
931
FF
0
B
813109730155
F
30000
A
7096
E
333
B
8
DCBE
77079
+
CMGL
:
6
,
2
,,
22
07813108608805
F
931
FF
0
B
813109730155
F
30000
A
70930598
D
26
A
7
DBDF
68
OK
All AT commands entered during
this period of time will be
ignored.
All AT commands entered
during this period of time will
be ignored.
Some special AT commands can be aborted by newAT commands. Such special
commands are called abortive commands.
The MU609 supports the following abortive AT commands:
TheAT+COPS Set command
AT+CLCK
AT+CLCC
TheAT+CLIP Query command
ATD
ATA
The IPINIT Execute command
IPOPEN
IPSEND
IPSENDEX
IPCLOSE

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Example:
AT+COPS=1,2,23415
OK
Before the results ofAT+COPS
is returned, enter any characters
(such as"AT"), the module will
terminate the processing of
AT+COPSand returnOK. The
entered characters are used to
abort the command only .
Some commands can be executed when SIM card is inserted. MU609 would return
to SIM failure if SIM card is not inserted. For more information, see Property
Description of relatedAT in the latest version of MU609 V100R002 of HUAWEI
MU609 HSPA LGA Module AT Command Interface Specification.
Example:
AT+CREG?
+CME ERROR: SIM failure
Note：
SIM failure indicates that SIM card is not inserted.
1.3.3 Recommended Timeout Mechanism for AT Commands
Processed by a Host
A module processesAT commands in series. Do not send anotherAT command
before the result for the current command is returned or the current command times
out (except when the current command is an abortiveAT command). The following
table listsAT command timeout durations (starting from the time when an AT
command arrives at a port).
Table 1-1 AT command timeout duration
AT Command
Timeout Duration
General AT commands
30s
AT+CMSS/AT+CMGS (used to send text
messages)
60s
AT+COPS=? (used to search for networks)
120s
After anAT command times out, it is recommended that the host check whether the
module is functioning normally. The following procedure is provided for your
reference:

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1. The host sends AT to the module.
2. If the module returns failure information, go to step 5.
3. If the module returns success information, the module is functioning normally.
4. If the host times out (the host waits for a response for over 30 seconds) three
times when waiting for the response from the module, go to step 5. Otherwise go
to step 1.
5. The host deems that the current module does not exist or is unavailable. Close
the port, stop sending all AT commands, exit the procedure to determine
whether the module is normal, and re-search for modules.

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2 Initialization Application Scenarios
2.1 Startup Indication ^SYSSTART
2.1.1 Reference Process
Command
Description
A module, without solicitation, presents ^SYSSTART to
its host to indicate that the module is starting.
^SYSSTART
Indicate that a module is starting.
Notes:
^SYSSTART is presented only when a module is starting and will not be presented after a
module has started.
^SYSSTART is presented only after the radio frequency (RF) initialization completes and
will not be presented in offline mode.
2.1.2 Troubleshooting
Scenario
Possible Error
Information
Solution
The module presents
^SYSSTART during startup.
After that, the module
presents ^SYSSTART again.
Indicate that the
module has been
reset.
If ^SYSSTART is presented
repeatedly, send the module
to the specified repair center.

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2.2 Querying Basic Information
2.2.1 Reference Process
Command
Description
AT+GMR/CGMR
Query software version.
Software version
OK
Software version. e.g. 11.103.03.00.00
AT+GMI/CGMI
Query manufacturer identification.
Manufacturer
Identification
OK
For example: Huawei Technologies Co., Ltd.
AT+GMM/CGMM
Query model identification.
Model identification
OK
For example: MU609
AT+GSN/CGSN
Query product IMEI.
IMEI
OK
For example: 865261010004010
Note:
The previously listed commands are Query commands and cannot be used to configure
settings.
2.2.2 Troubleshooting
Scenario
Possible Error
Information
Solution
AT+GSN/CGSN
+CME ERROR: memory
failure
This error occurs when a
module's IMEI is not specified.
This problem is solved after
the IMEI is written into the
module.