কিছু নোকিয়া কোড দিলাম , হয়তো সব মডেল এ কাজ করবে না সব গুলা কোড কিনতু maximum গুলা কাজ করবে.....।


Code
Description
*3370#
Activate Enhanced Full Rate Codec (EFR) - Your phone uses the best sound quality but talk time is
reduced my approx. 5%
#3370#
Deactivate Enhanced Full Rate Codec (EFR)
*#7370925538#
Reset wallet
*4720#
Activate Half Rate Codec - Your phone uses a lower quality sound but you should gain approx 30%
more Talk Time.
#4720#
Deactivate Half Rate Codec.
*#7370#
To reformat
*#0000#
Displays your phones software version, 1st Line : Software Version, 2nd Line : Software Release Date,
3rd Line : Compression Type.
*#9999#
Phones software version if *#0000# does not work.
*#06#
For checking the International Mobile Equipment Identity (IMEI Number).
#pw+1234567890+1#
Provider Lock Status. (use the “*” button to obtain the “p,w” and “+” symbols).
#pw+1234567890+2#
Network Lock Status. (use the “*” button to obtain the “p,w” and “+” symbols).
#pw+1234567890+3#
Country Lock Status. (use the “*” button to obtain the “p,w” and “+” symbols).
#pw+1234567890+4#
SIM Card Lock Status. (use the “*” button to obtain the “p,w” and “+” symbols).
*#147#
(vodafone) this lets you know who called you last.
*#1471#
Last call (Only vodofone).
*#21#
Allows you to check the number that “All Calls” are diverted to.
*#2640#
Displays security code in use.
*#30#
Lets you see the private number.
*#43#
Allows you to check the “Call Waiting” status of your phone.
*#61#
Allows you to check the number that “On No Reply” calls are diverted to.
*#62#
Allows you to check the number that “Divert If Unreachable (no service)” calls are diverted to.
*#67#
Allows you to check the number that “On Busy Calls” are diverted to.
*#67705646#
Removes operator logo on 3310 & 3330.
*#73#
Reset phone timers and game scores.
*#746025625#
Displays the SIM Clock status, if your phone supports this power saving feature “SIM Clock Stop
Allowed”, it means you will get the best standby time possible.
*#7760#
Manufactures code.
*#7780#
Restore factory settings.
*#8110#