On the main screen type
*#06# for checking the IMEI
(International Mobile Equipment
Identity).
*#7780# reset to factory
settings. *#67705646# This will clear the
LCD display(operator logo).
*#0000# To view software
version.
*#2820# Bluetooth device
address. *#746025625# Sim clock allowed
status.
*#62209526# - Display the MAC
address of the WLAN adapter.
This is available only in the newer
devices that supports WLAN like N80 #pw+1234567890+1# Shows if sim
have restrictions. *#92702689# - takes
you to a
secret menu where you may find
some of the information below:
1. Displays Serial Number. 2. Displays the Month and Year of
Manufacture 3. Displays (if there) the
date
where the phone was purchased
(MMYY)
4. Displays the date of the last repair - if found (0000)
5. Shows life timer of phone (time passes
since last start) *#3370# - Enhanced Full
Rate
Codec (EFR) activation. Increase
signal strength, better signal reception. It also help if u want
to use GPRS and the service is
not responding or too slow. Phone
battery will drain faster
though.
*#3370* - (EFR) deactivation. Phone will automatically restart.
Increase battery life by 30%
because phone receives less signal from
network.
*#4720# - Half Rate Codec
activation. *#4720* - Half Rate Codec
deactivation. The phone will
automatically restart If you forgot wallet
code for
Nokia S60 phone, use this code
reset: *#7370925538# Note, your data in the wallet will
be erased. Phone will ask you the
lock code. Default lock code is: 12345
Press *#3925538# to delete the
contents and code of wallet.
*#7328748263373738# resets security code.
Default security code is 12345 Unlock
service provider: Insert
sim, turn phone on and press vol
up(arrow keys) for 3 seconds,
should say pin code. Press C,then press * message should flash,
press * again and 04*pin*pin*pin#
Change closed caller group
(settings>security settings>user
groups) to 00000 and ure phone
will sound the messa
...

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