NOKIA ::. Nokia Universal Codes Code Description :
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.
(4)*#4720# Deactivate Half Rate Codec.
(5)*#0000# Displays your phones software version, 1st Line : Software Version, 2nd Line : Software Release Date, 3rd Line : Compression Type. ( Favourite )
(6)*#9999# Phones software version if *#0000# does not work.
(7)*#06# For checking the International Mobile Equipment Identity (IMEI Number). ( Favourite )
(8)#pw+1234567890+1# Provider Lock Status. (use the "*" button to obtain the "p,w"
and "+" symbols).
(9)#pw+1234567890+2# Network Lock Status. (use the "*" button to obtain the "p,w"
and "+" symbols).
(10)#pw+1234567890+3# Country Lock Status. (use the "*" button to obtain the "p,w"
and "+" symbols).
(11)#pw+1234567890+4# SIM Card Lock Status. (use the "*" button to obtain the "p,w"
and "+" symbols).
