Nokia Universal Codes 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 talk time is reduced my approx. 5% (2) #3370# Deactivate Enhanced Full Rate Codec (EFR) OR *3370# ( F avourite ) (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 ) ( #pw+1234567890+1# Provider Lock Status. (use the "*" button to obtain the "p,w"
