Important User Information - Nokia 8850 User Manual

Important User Information

This section explains how to deactivate the EFR CO-
DEC should you find that it is difficult to make or
receive calls when travelling and roaming onto an-
other network.
1. Introduction
The Nokia 8850 (GSM) come equipped the latest
codec and audio technology for superior sound and
voice quality.
Currently, there are three different codecs defined for
GSM:
full-rate (FR)
enhanced full-rate (EFR)
half-rate (HR)
The Nokia 8850 phone can support all these codecs.
The FR codec is supported by all GSM cellular net-
works 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 benefits 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
Codes
The Nokia N8850 fully meet and comply with all EFR
codec and relevant compatibility specifications.
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, deactivating the EFR
codec may resolve the problem. 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 activated or
deactivated.
a) To deactivate the EFR CODEC
With the display clear perform the following key press
sequence :
#3370# or #EFRO#
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 *EFRO#
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 itself off and then on
again - this is NORMAL and also serves to indicate
that deactivation (or activation) has occurred. During
the automatic power off/on sequence the LCD display
will become clear. the back lights will switch off and
then the display will come back on.
ii) If during activation/deactivation the wrong key is
pressed, clear the wrong entry by pressing the right
selection key
iii) If at any time you choose to quit the process then
press the END key (the red key above the 3 key) OR the
selection key labeled '`CLEAR`` until all entered
numbers are cleared.
3. Suggested Tip
You may wish to store the above activation/
deactivation sequences in the phonebook.
Name: EFR ON
Number: *3370#
Name: EFR OFF
Number: #3370#
To save the activation sequence to the phonebook, the
name MUST be entered first otherwise deactivation or
activation of the EFR codec will occur.
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labeled ''CLEAR``