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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.
" Introduction
The Nokia 3310 (GSM) comes
equipped the latest codec and audio
technology for superior 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 3310 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 benefits of E
FR if supported byyour network
operator. Currently only some
networks support the EFR Codec in
addition to the FR codec.
" Deactivating/Activating
The EFR Codec
The Nokia N3310 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 'Y' 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 © key.
iii) If at anytime you choose to quit
the process then press and hold the
© key.
" Suggested Tip
Important User Information
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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