(1) *3370# Activate Enhanced FullRate Codec (EFR) – Your phone uses the best sound quality but talk time is reduced my appr ox. 5%
(2) #3370# DeactivateEnhanced Full Rate Codec (EFR) OR *3370#( Favourite )
(3) *#4720# Activate Half Rate Codec – Your phone uses a lower quality sound but you should gainapprox 30% more Talk Time.
(4) *#4720# Deactivate Half Rate Codec.
(5) *#0000# Displays your phonessoftware version, 1st Line: Software Version, 2nd Line : Software ReleaseDate, 3rd Line : Compression Type. ( Favourite )
(6) *#9999# Phones software version if*#0000# does not work.
(7) *#06# For checkingthe 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). (12) *#147# (vodafone) this lets you know who called you last. (13) *#1471#Last call(Only vodofone). (14)*#21# Allows you to check the number that “All Calls” are diverted to (15) *#2640# Displayssecurity code in use. (16)*#30# Lets you see the private number. (17) *#43# Allows you tocheck the “Call Waiting” status of your phone. (18) *#61# Allows
United States