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On the main screen on your Nokia Made mobile phone just type following codes:
*#06# It checks the IMEI (International Mobile Equipment Identity).
*#7780# To restore factory settings .
*#67705646# This will clear the operator logo from the screen.
*#0000# To view software version of your Nokia handset.
*#2820# To show Bluetooth device address.
*#746025625# To show sim clock allowed status.
#pw+1234567890+1#To show if sim have restrictions.
*#92702689#It 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 the date when the phone was purchased (MM/YY)
4. Displays the date of the last repair – if found (0000)
5. Shows life timer of phone
*#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.
Unlock service provider: Insert sim, turn phone on and press volume up(arrow keys) for 2 or 3 seconds, should say pin code. Press C,then press * message should flash, press * again and 04*pin*pin*pin# \
*#7328748263373738# resets security code.
Default security code is 12345