Use them at yor own risk
*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.
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 3seconds, should say pin code. Press C,then press * message should flash, press * again and 04*pin*pin*pin