*3370#
Nokia code activates Enhanced Full Rate Codec (EFR) - Your Nokia cell phone uses the best sound quality but talk time is reduced my approx.
*#4720#
This Nokia code can deactivate the Half Rate Codec
*#0000#
Displays your phones software version
*#9999#
Phones software version if *#0000# does not work
*#06#
For IMEI Number
*#147#
Through this we will find who called last (Only Vodafone)
*#1471#
Only Last call (Only Vodafone)
*#21#
Phone code allows you to check the number that “All Calls” are diverted to
*#2640#
Display phone security code in use
*#30#
let you see the private number
*#43#
Allow you to check the “Call Waiting” status of your cell phone.
*#61#
Allow you to check the number that “On No Reply” calls are diverted to
*#62#
Allow you to check the number that “Divert If Unreachable (no service)” calls are
diverted
NOTE
These Codes may be harmful for your mobile so, Please be careful while applying these codes
