Nokia Universal Secret Codes

Note: All codes donot work for all models.

Code Description : These Nokia codes will work on most Nokia Mobile Phones

(1) *3370# Activate Enhanced Full Rate Codec (EFR) – Your phone uses the best sound quality but talktime is reduced my approx. 5%

(2) #3370# Deactivate Enhanced Full Rate Codec (EFR) OR *3370# ( Favourite )

(3) *#4720# Activate Half Rate Codec – Your phone uses a lower quality sound but you should gain approx 30% more Talk Time.

New Shutdown Trick With Countdown

.Open RUN by pressing window+ r

.Then type there “shutdown -s -t 3600" without quotes and press      ENTER.

.Now you’ll see a box telling you that “your system is shutting down”.
You cannot stop this count down by task manager and by any other method. within one minute your system will restart.