Huawei E5331 Dimensions

E5331 FAQs
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E5331 FAQs ......................................................2
Q1: Main Features of E5331:.............................................................................................2
Q2: Hardware specifications of E5331:............................................................................2
Q3: Keys, Interface of E5331.............................................................................................5
Q4: What information displayed on E5331’s OLED screen?.........................................5
Q5: The AutoPlay dialog box does not appear when connect E5331 to PC with USB
cable 6
Q6: Check whether E5331 has been successfully installed..........................................7
Q7: Establish WiFi connection between PC and E5331.................................................8
Q8: My device connected to E5331’s wireless network, but cannot open Web UI...10
Q9: My device connected to E5331 with USB cable,but cannot open Web UI..........12
Q10: E5331’s signal is weak and cannot register to 3G network .................................12
Q11: E5331’s Wi-Fi signal is always weak.......................................................................13
Q12: Default encryption method of E5331.......................................................................14
Q13: I forget my Wi-Fi key and Web login password I can’t login my E5331..............14
Q14: How long it may take to fully charge E5331 and how long E5331 can work by
using the fully charged battery? ........................................................................................15
Q15: I feel my E5331 getting hot after long hours usage. Is there safety concern? ..16
Q16: How can I enter into forced downloading mode？................................................16
Q17: How can I get version information of my E5331？................................................16
Q18: Will the Mobile WiFi connect to the Internet automatically if I roam to a different
network? ...............................................................................................................................17
Q19: Clients connected to the Mobile WiFi cannot communicate with each other....18

E5331 FAQs
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E5331 FAQ
Q1: Main Features of E5331:
A:
The E5331 mainly supports the following features:
HSPA+ (DL) data service of up to 21 Mbit/s
HSPA+ (UL) data service of up to 5.76 Mbit/s
HSDPA (DL) data service of up to 14.4 Mbit/s
HSUPA (UL) data service of up to 5.76 Mbit/s
UMTS data service of up to 384 kbit/s
EDGE data service of up to 236.8 kbit/s
GPRS data service of up to 85.6 kbit/s
PS domain data service based on UMTS and GSM
SMS based on CS/PS domain of GSM and UMTS
Wi-Fi
Built-in DHCP Server, DNS RELAY and NAT
Plug and Play (PnP)
USB Extension Cable, easy to connect
Standard Micro USB interface
LED indicators
Built-in UMTS and WLAN high gain antenna
Windows XP, Windows Vista, Windows 7, MAC OS X 10.5, 10.6 and 10.7
Q2:Hardware specifications of E5331:
A:
Item
Specifications
Technical
standard
WAN: HSPA+/HSPA/UMTS/EDGE/GPRS/GSM
WLAN: IEEE 802.11b/g/n

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Item
Specifications
Operating
frequency
HSPA+/HSPA/UMTS
2100/900 MHz
EDGE/GPRS/GSM
1900/1800/900/850 MHz
WLAN: 2400–2483.5 MHz
Internal memory
128 MB Flash, 64 MB Memory
Maximum
transmitter
power
UMTS: 24 (+1/-3) dBm
WLAN
802.11b: 14 (+/-3) dBm
802.11g: 12 (+/-3) dBm
802.11n: 7 (+/-3) dBm
Receiver
sensitivity
UMTS: -106 dBm
WLAN 802.11b
-76 dBm@11 Mbit/s
-82 dBm@1 Mbit/s
WLAN 802.11g: -65 dBm@54 Mbit/s
WLAN 802.11n: -64 dBm@65 Mbit/s
WLAN speed
802.11b: Up to 11 Mbit/s
802.11g: Up to 54 Mbit/s
802.11n: Support MCS0–MCS7; Up to 72.2 Mbit/s.
Maximum power
consumption
3.5 W
Power supply
AC: 100–240 V
DC: 5 V, 1 A
Battery
Type: Li (Rechargeable)
Capacity: 3.7 V, 1500 mAh
Maximum working time: 5 hours
Maximum standby time: 280 hours while Wi-Fi is off; 30 hours
while Wi-Fi is often on.
External
interfaces
USB interface: Micro USB
SIM card: standard 6-pin SIM card interface
Indicators
LED indicators: Signal, Wi-Fi, Battery, SMS
key-press
Power switch, Reset switch
Antenna
Built-in GSM/UMTS main diversity antenna
Built-in UMTS diversity antenna
Built-in WLAN antenna

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Item
Specifications
Dimensions
(D ×W ×H)
92.8 mm×60.0 mm×13.8 mm
Weight
about 82 g (including the battery)
Temperature
Operating: 0℃to +35℃
Storage: -40℃to +70℃
Humidity
5% to 95%( non-condensing)

E5331 FAQs
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Q3:Keys, Interface of E5331
A:
Appearance
Key Function
Power Button
•Press and hold to turn on/off E5331.
•When the Indicators is off, press to display information.
Reset Button
•Press and hold the RESET button until the indicators is coruscated then E5331 will
restart, after E5331 has boot up all the password will be restored to default.
Q4:What information displayed of E5331’s LED indicator?
A: Information you can read from the LED indicator of E5331 showed below

E5331 FAQs
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Q5:The AutoPlay dialog box does not appear when connect E5331 to PC with USB
cable
A:
1. Please check if the computer OS meets one of the following:
(1) Windows XP / Windows Vista / Windows 7
(2) MAC OS X 10.5, MAC OS X 10.6, MAC OS X 10.7
2. Make sure E5331 is turned on (LED indicator has lighten up and WiFi icon has been green). To turn
on E5331, hold and press ― ‖ until all the LED indicators lighten up. If E5331 is out of battery
power, please charge it by USB cable or power adaptor.
3. Find the drive path MobileWiFi. It should appear as one virtual CD-ROM drive in
. Double click MobileWiFi to open the folder of ―E5331‖, double click ―
AutoRun.exe‖ to install E5331 and drivers manually.

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4. If the drive path MobileWiFi not showing up, make sure there is no damage on USB cable and
no contamination at PC USB connectors. Try to re-plug in USB connectors (both end of USB cable)
to E5331 and computer again.
Q6:Check whether E5331 has been successfully installed
A:
1. Click and find ―My Computer‖ as . Right click ―My Computer‖ select ―Manage‖ to
open the ―Computer Management‖Click ― ‖. If E5331 has been installed
successfully, You would see two new ―com port‖, ―USB Mass Storage Device‖ , ―USB Composite
Device‖ and ―HUAWEI Mobil Connect–3G Network Card ‖displayed in .

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If ―HUAWEI Mobil Connect –3G Network Card‖ shows , right click it then select ―Uninstall‖. Re-load
the network driver for E5331 by right click , then select ―Scan for hardware
changes‖.
Q7:Establish WiFi connection between PC and E5331
A:
Please follow these steps to set up your WLAN
1. Enable your wireless network card and double click icon displayed on windows start bar to
open ―Choose a wireless network‖dialog
2. Select SSID of E5331 in the local wireless device list (The WiFi Key and the SSID can be found on
a label stick inside the back cover), click to connect.

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3. Input WiFi Key in the dialog of password input then click to establish connection
please pay attention to the case sensitive of WiFi passwords.

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4. After the icon of wireless network card turned from (status of acquiring IP address ) into
,your PC has established WiFi connection with E5331 successfully, enter
http://192.168.1.1 in web browser (ex. IE) to visit Web UI(Double click the web browser and
the Web UI will open too).
Q8:My device connected to E5331’s wireless network, but cannot open Web UI
A:
1. Double to check your wireless network connection on windows start bar. Make sure your
device is connected with your E5331 not other Wi-Fi device.
2. Open Web Browser from your device (ex. Microsoft Internet Explorer). Go http://192.168.1.1 to
open E5331’s Web UI.
3. If Web Browser failed to bring you to Web UI, click ―Tool‖ from Browser then select ―Internet
Options‖.

E5331 FAQs
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Select―General‖tab,then click―Delete Cookies‖.
Select ―Connections‖ tab, then click ―LAN settings‖.
For the ―Local Area Network (LAN) Settings‖ pop-up, uncheck the top three check-boxes. Then click
―OK‖ to apply changes.

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Refresh the Web Browser to show E5331 management console page.
Q9:My device connected to E5331 with USB cable, but cannot open Web UI
A:
1. Check whether E5331 has been successfully installed as Q6
2. Check your Web Browser settings as Q8
Q10: E5331’s signal is weak and cannot register to 3G network
A:
1. Please check local network condition, check whether there is 3G network which provided by
telecom operator at the moment. Ensure you are not in some close environment. (You may
check the signal strengthen by the icon displayed on Web UI main page)
2. Please move E5331 toward to window to get better signal
3. If the network condition is good but still cannot register, please try to reset E5331 and try again
4. Sometimes E5331 will be rejected by the operator for some reasons. Please reset E5331 and

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check. If E5331 still cannot camp on the network, please contact with your device provider.
5. Login Web UI to check whether E5331 has been set to 2G only mode. If your E5331 has been set
to 2G only, please select the 3G only option in the drop down menu.
Q11: E5331’s Wi-Fi signal is always weak
A:
1. When E5331 using it’s battery power, in order to save energy for longer run-time E5331 will
lower down its transmit power ,so Wi-Fi signal is weaker compare with powered by USB or power
adapter. Connect E5331 to power adapter or with USB cable to a running computer’s USB port
will enhance E5331’s Wi-Fi signal strength.
2. Keep E5331 at least 3 to 6 feet away from other electrical devices which may create RF signal
and cause interference (for example, microwave oven, TVs, cordless/cellular phones, baby
monitors or wireless speakers). If you needn’t using any of those devices when you want to
connect Internet, please turn it off.
3. Wi-Fi covered range of E5331 is according to its power supply mode and its using environment. In
Idea clear square area the Wi-Fi covered range of E5331 showed below:
Use power adapter: 100m (328ft)
Use USB cable connect: 20m (66ft)
Use battery supply: 10m (33ft)
4. In actual use Wi-Fi covered range maybe different from idea square area, it decided by the
environment you use. The closer to E5331, the stronger Wi-Fi signal you get. And every obstacle

E5331 FAQs
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(walls, ceilings, furniture) between your device and E5331 may decrease Wi-Fi signal strength.
Move your device closer to E5331 can avoid obstacles and improve Wi-Fi signal.
5. Change the Wi-Fi channel to fix one other than auto (you can try the available channel one by one
and select the channel with best signal strength)
Q12: Default encryption method of E5331
A:
E5331 support following encryption method
1. SHARE authentication mode: WEP /NONE
2. WPA-PSK authentication mode: ASE/TKIP/AES+TKIP
3. WPA2-PSK authentication mode: ASE/TKIP/AES+TKIP
4. WPA/WPA2-PSK authentication mode: ASE/TKIP/AES+TKIP
The default encryption method of E5331 is WPA/WPA2-PSK authentication mode: TKIP
If you changed encryption method of E5331 the Wi-Fi connection between PC and E5331 will be
disconnected, please enter the newWi-Fi key (Wi-Fi key of the encryption you selected) when you
want to establish Wi-Fi connection.
Q13: I forget my Wi-Fi key and Web login password I can’t login my E5331
A:
If you forget your Web login password, you needn’t to worry. Try to restore your E5331 as following
step
1. Open the back cover of E5331
2. Press and hold the RESET button until LED indicators are
coruscated, and E5331 will restart. After E5331 has boot up
all the passwords will be restored to default.
Notice: After restored E5331 all the user settings will be restored to
default settings.
If you only forget your WiFi Key, try to set the new WiFi key in the ―WLAN Basic Setting‖ page, input

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new WIFI key directly in WPA Pre Shared Key bar or select show password option the view the
password
Q14: How long it may take to fully charge E5331 and how long E5331 can work
by using the fully charged battery?
A:
1. Maximum time to full charge E5331 battery
Device off charged by AC charger: 3h
Device on charged by AC charger: 3.5h—4h.
Device off and charged by USB cable: 4h—4.5h.
Device on and charged by USB cable: 4.5h—5h.
2. Maximum working time:
Using battery and WI-FI enabled (with data transmission):5hours.
Using battery and WI-FI disabled (standby mode): 280h
Some improper uses will influent the life of battery, for example: used under high/low temperature
and humid environment, leaving battery unused for long time, the battery be charged and discharged
for too many times

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The environment temperature required by the battery is -20℃-60℃(the ideal value is 35℃)，the
relative humidity is 5℃-95℃（the ideal value is 55℃），the battery life can reach 18 months.
Q15: I feel my E5331 getting hot after long hours usage. Is there safety concern?
A:
Like most other electronic devices, E5331 get hotter during charge or big data transfer. It is a quite
normal phenomenon if working in regular office environment. Even if it worked in hot environment,
E5331 will automatically power off if its temperature reach 157 ℉(69 ℃) for safety protection.
(Please don’t use E5331 in close environment; it will cause poor signal and high heat of your E5331).
Q16: How can I enter into forced downloading mode？
A:
When your computer can't recognize E5331, that means you can’t see new ports or new network
card come out in Device Manager, in this case, you can use forced download to upgrade.
In the power off mode, press and hold ―Power‖ and ―Reset‖ at least 5 seconds (hold ―Reset‖ first)
then you can see all LED indictors are coruscated, now release press ―Reset‖ key again. After all the
LED indictors has coruscated run one key update again to update firmware.
Q17: How can I get version information of my E5331？
A:
Click " ",
then you can see software & hardware version of your E5331.

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Q18: Will the Mobile WiFi connect to the Internet automatically if I roam to a
different network?
A:
Please check the connection mode of your Mobile WiFi firstly.
Manual mode: You can launch the web management page and follow the prompts to
connect to or disconnect from the network. The network connection is irrespective of roaming
state of the network.
Auto mode:
Enable even when roaming is selected by default. If you roam to a different network
with the Mobile WiFi, it will automatically disconnect an established network connection.
If you need to access the Internet from the new network, you must re-establish a network
connection.
If Enable even when roaming is not selected, the established network connection will
not be effected by roaming state of the network

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Q19: Clients connected to the Mobile WiFi cannot communicate with each other.
A: If access point (AP) isolation is enabled, clients connected to the Mobile WiFi cannot communicate
with each other. If AP isolation is disabled, clients connected to the Mobile WiFi can communicate with
each other.