Nokia Secret Codes

Those who already heard of the concept of 'Nokia Hacks' or 'Nokia Secret Codes” are probably aware of the fact that these tricks offer users interesting information about their handset.These codes have been identified by people who are trying to improve their handsets with tweaks. Using some of these codes can also enhance some of the functions of the phone like the quality of the sound, as well as photos or even videos recorded with the phone's camera.

*#7328748263373738# resets security code

Default security code is 12345

Press *#3925538# to delete the contents and code of wallet. 

*#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