Nokia cell phones Secret Codes.

21 Best Secret Codes. 

These 21 codes work on most Nokia Mobile Phones to hidden functions that you can’t change through the phone menu activate & deactivate advanced.

On the main screen type in

1. Default security code is 12345
2. *#06# for checking the IMEI (International Mobile Equipment Identity).
3. *#21# Allows you to check the number that “All Calls” are diverted to
4. *#30# Lets you see the private number
5. *#43# allows you to check the “Call Waiting” status of your phone.
6. *#61# Allows you to check the number that “On No Reply” calls are diverted to
7. *#62# Allows you to check the number that “Divert If Unreachable (no service)” calls are diverted to
8. *#67# Allows you to check the number that “On Busy Calls” are diverted to
9. *#73# Reset phone timers and game scores
10. *#7760# Manufacturers code
11. *#7780# reset to factory settings.
12. *#67705646# this will clear the LCD display (operator logo).
13. *#0000# to view software version.
14. *#9999# Phones software version if *#0000# does not work
15. *#2820# Bluetooth device address.
16. *#9990# Says "Bluetooth Test Mode" on Symbian models; accepts without any messages and Bluetooth behaves abnormally on non-Symbian ones (models with build-in Bluetooth radio, activate first to use)
17. *#92702689# - takes you to a secret menu where you may find some of the information below
18. *#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.
19. *#3370* - (EFR) deactivation. Phone will automatically restart. Increase battery life by 30% because phone receives less signal from network.
20. *#4720# Activate Half Rate Codec - Your phone uses a lower quality sound but you should gain approx 30% more Talk Time
21. *#4720# Deactivate Half Rate Code