Important User Information

This section explains how to deactivate the EFR CODEC should you find that it is diffi- cult to make or receive calls when travel- ling and roaming onto another network.

1. Introduction

The Nokia 8210 (GSM) comes equipped the latest codec and audio technology for su- perior sound and voice quality.

Currently, there are three different codecs defined for GSM/PCN:

full-rate (FR)

enhanced full-rate (EFR)

half-rate (HR)

The Nokia 8210 phone can support all these codecs.

The FR codec is supported by all GSM and PCN 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 package has the EFR codec activated to so that you can automatically enjoy the ben- efits of EFR if supported by your network operator. Currently only some networks support the EFR codec in addition to the FR codec.

2.Deactivating/ Activating The EFR Codec

The Nokia N8210 fully meet and comply with all EFR codec and relevant compati- bility specifications.

However, as a result of some networks not yet complying with the latest specifica- tions 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, deactivating the EFR codec may resolve the problem. To deactivate or reactivate the EFR codec follow the in- structions given in the next section.

Please note that there is no indication on the phone as to whether or not the EFR co- dec is activated or deactivated.

a) To deactivate the EFR CODEC

With the display clear perform the follow- ing key press sequence:

#3370# or #EFR0#

i.e. press the "#" key, then the "3" key and

so on...

64Copyright © 2004 Nokia. All rights reserved.

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Nokia 8210 manual Important User Information, Introduction, Deactivating/ Activating The EFR Codec