Nokia 5110 User Manual download pdf (Page 37)

Reference Information

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 co-

dec may resolve the problem. To deactivate or reacti-

vate 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 deac-

tivated.

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 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 any time you choose to quit the process then

press and hold the key.

3. Suggested Tip

you may wish to store the above activation/deactiva-

tion 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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Nokia 5110 User Manual Page 37

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