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56 Copyright © 2004 Nokia. All rights reserved.
If certain features are in use (Keypad lock, Fixed Dial-
ling, etc.), you may first need to turn those features off
before you can make an emergency call. Consult this
document and your local cellular service provider.
When making an emergency call, remember to give all
the necessary information as accurately as possible.
Remember that your wireless phone may be the only
means of communication at the scene of an accident -
do not cut off the call until given permission to do so.
Important User
Information
This section explains how to deactivate the EFR
CODEC should you find that it is difficult to make
or receive calls when travelling and roaming
onto another network.
1. Introduction
The Nokia 6150 (GSM) come equipped the latest
codec and audio technology for superior sound
and voice quality.
Currently, there are three different codecs de-
fined for GSM 900/PCN 1800:
• full-rate (FR)
• enhanced full-rate (EFR)
•half-rate (HR)
The Nokia 6150 phone can support all these co-
decs.
The FR codec is supported by all GSM 900/PCN
1800 cellular networks and phones.
The network automatically selects which codec
is used, FR or EFR (if supported by the network).
The Nokia phone supplied within this sales pack-
age has the EFR codec activated to so that you
can automatically enjoy the benefits of EFR if
supported by your network operator. Currently
only some networks support the EFR codec in ad-
dition to the FR codec.
2. Deactivating/Activating The EFR Codes
The Nokia 6150 fully meet and comply with all
EFR codec and relevant compatibility specifica-
tions.
However, as a result of some networks not yet
complying with the latest specifications you may
find it impossible to make or receive calls, if the
EFR codec is activated, e.g. when you are visiting
or roaming in a foreign network.
If problems are encountered in making a call
(with the display of "Check operator services" or
another similar message), OR receiving calls, de-
activating the EFR codec may resolve the prob-
lem. To deactivate or reactivate the EFR codec
follow the instructions given in the next section.
Please note that there is no indication on the
phone as to whether or not the EFR codec is ac-
tivated or deactivated.
a) To deactivate the EFR CODEC
With the display clear perform the following key
press sequence:
#3370# or #EFR0#
i.e. press the "#" key, then the "3" key and so on...
b) To activate the EFR CODEC
With the display clear perform the following key
press sequence:
*3370# or *EFR0#
i.e. press the "*" key, then the "3" key and so on...
Notes to a) and b)
i) Immediately after pressing *3370# (or
#3370#) the phone will automatically power it-
self off and then on again - this is NORMAL and
also serves to indicate that deactivation (or acti-
vation) has occurred. During the automatic pow-
er off/on sequence the LCD display will become
clear, the back lights will switch off and then the
display will come back on.