
Quick Start Guide
Offices worldwide
The services described in this publication are subject to availability and may be 
modified from time to time. Services and equipment are supplied subject to 
British Telecommunication’s plc’s respective standard conditions of contract. 
Nothing in this publication forms any part of a contract.
© British Telecommunications plc 2008.
Registered Office: 81 Newgate Street, London EC1A 7AJ. 
Registered in England No. 1800000.
Designed and produced by The Art & Design Partnership Ltd.
Printed in China / Issue 2 / ADP01-08
Caller Display and the calls list
You must subscribe to a Caller Display service for this feature to work. Your network provider 
may charge you for this service.
Caller Display allows you to see the number of the person calling you before you answer 
the phone. The calls list holds details of your last 50 callers, including the phone number, 
date and time of the call. If a number matches a stored directory entry, the caller’s name is 
displayed instead.
The calls list also alerts you to missed calls. When you have new missed calls, the   icon will 
flash in the display and show how many missed calls you have received.
View and dial from the calls list
1. Press  . The most recently received call is displayed. 
New
 is displayed when a call is new 
(has not yet been viewed). Use   or   to scroll through the list.
  When all new calls have been viewed 
New
 will disappear and the call counter will show 
the total amount of old calls received.
2. Press   to dial the number. Or press Copy to copy the number to the phonebook  
or Del to delete the number from the list.
3. Press   to exit and return to standby.
SIM card reader/writer
Your BT Synergy 4100 has a SIM card reader/writer which allows you to copy entries from a 
SIM card to the Synergy phonebook and from the Synergy phonebook to a SIM card. 
Copy phonebook entries to or from a SIM card
1. Slide out the SIM reader drawer from the side of the base and insert the SIM card.
2. At the handset, press  , then Opt. Then scroll   to 
SIM Copy
 and press OK.
3. Press   or    to select either 
Copy from SIM
 or 
Copy to SIM
 and select OK.  
The display will show 
Please Wait
 while it checks your SIM card.  If your SIM card is  
PIN protected, enter the SIM card PIN and press OK.
  Copying
 will be displayed. Once complete, the number of entries copied will be displayed.
Text messaging
Before you can send and receive text messages you need to subscribe to the text messaging 
service (no subscription charge) and to Caller Display (a quarterly fee may be payable, check 
with your network provider). Please see the online full user guide for details.
To subscribe to the text messaging service
You will be automatically registered when you send your first text message or you can send 
the word ‘Register’ to 00000. You will receive a welcome message back as confirmation.
To access the text messaging menu:
1. Press   or   until 
TXT Menu
 is displayed and press OK. You can now scroll through 
the menu options: Write Message, Inbox, Outbox and Text Settings.
2. When the option you want is displayed, press OK and follow the menu options available.
Multi-handset functions
If you have bought a multiple pack and therefore have more than one handset registered 
to the base, you can:  make internal calls, transfer an external call from one handset to 
another, hold a conference call and make an internal call between two handsets while a 
third is on an external call.
For a full explanation of features and instructions, please see the main 
user guide online at www.bt.com/help/userguides
For information on safety instructions, 
cleaning, technical information or 
connecting to a switchboard, please refer to 
the ‘General Information’ section in the full 
user guide at www.bt.com/help/userguides
Guarantee
Your BT Synergy 4100 is guaranteed for a period of  
12 months from the date of purchase.
Subject to the terms listed below, the guarantee 
will provide for the repair of, or at BT’s or its agent’s 
discretion the option to replace the BT Synergy 
4100, or any component thereof, (other than 
batteries), which is identified as faulty or below 
standard, or as a result of inferior workmanship or 
materials. Products over 28 days old from the date 
of purchase may be replaced with a refurbished or 
repaired product.
The conditions of this guarantee are:
• The guarantee shall only apply to defects that  
occur within the 12 month guarantee period.
• Proof of purchase is required.
• The equipment is returned to BT or its agent  
as instructed.
This guarantee does not cover any faults or defects 
caused by accidents, misuse, fair wear and tear, 
neglect, tampering with the equipment, or any 
attempt at adjustment or repair other than through 
approved agents.
This guarantee does not affect your statutory rights.
For further information within and outside the 12 
month guarantee, please refer to the full user guide 
at www.bt.com/help/userguides
Product disposal instructions
The symbol shown here and on the product means 
that the product is classed as Electrical or Electronic 
Equipment and should not be disposed with other 
household or commercial waste at the end of its 
working life.
The Waste of Electrical and Electronic Equipment 
(WEEE) Directive (2002/96/EC) has been put in 
place to recycle products using best available 
recovery and recycling techniques to minimise the 
impact on the environment, treat any hazardous 
substances and avoid the increasing landfill.
Product disposal instructions for residential users
When you have no further use for it, please remove 
any batteries and dispose of them and the product 
as per your local authority’s recycling processes. For 
more information please contact your local authority 
or the retailer where the product was purchased.
Product disposal instructions for business users
Business users should contact their suppliers and 
check the terms and conditions of the purchase 
contract and ensure that this product is not mixed 
with other commercial waste for disposal.
R&TTE Directive & Declaration  
of Conformity
This product is intended for use within the UK for 
connection to the public telephone network and 
compatible switchboards.
This equipment complies with the essential 
requirements for the Radio Equipment and 
Telecommunications Terminal Equipment Directive 
(1999/5/EC).
The Declaration of Conformity is published on  
the website http://www.suncorptech.com/bt
General information
A full user guide can be downloaded in PDF format 
from www.bt.com/help/userguides 
Please consider the environment before printing.
BT Synergy 4100
Troubleshooting
Most problems are caused by something very simple and can be fixed with a few simple checks: 
•  Make sure both the mains power adaptor cable and telephone line cord are plugged into 
the correct sockets and plugged in at the wall. 
•  Make sure you use all the cables and batteries (if supplied) that came in the box, not 
those from a previous product.
•  If you experience poor speech quality or interference, make sure the product is not 
located too close to other electrical appliances. This can also help improve the handset 
range from the base.
•  Make sure you charge the batteries for at least 24 hours before first use to ensure 
maximum battery performance. The charge capacity of the batteries will decrease  
over time.
Using your BT Synergy 4100 on a broadband Internet enabled line?
Remember to plug the phone into the wall socket via an ADSL microfilter if you have 
broadband Internet on your phone line, otherwise you may have problems with this 
product and your broadband service. Additional BT ADSL microfilters can be purchased 
from www.shop.bt.com
This guide can 
be recycled.
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