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.

56

Copyright © 2004 Nokia. All rights reserved.

Page 56
Image 56
Nokia 6150 manual Important User Information, Introduction, Deactivating/Activating The EFR Codes