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Copyright © 2004 Nokia. All rights reserved.
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...