Secret codes of Nokia

*3370#
Activates Enhanced Full Rate Codec (EFR)
#3370#
Deactivate Enhanced Full Rate Codec (EFR)
*#4720#
Activate Half Rate Code
*#4720#
deactivate the Half Rate Codec
*#0000#
phones software version
*#9999#
Phones software version if *#0000# does not work
*#06#
IMEI Number
#pw+1234567890+1#
Provider Lock Status
#pw+1234567890+2#
Network Lock Status
#pw+1234567890+3#
Country Lock Status
#pw+1234567890+4#
SIM Card Lock Status
*#147#
who called you last ( Vodafone)
*#1471#
Last call (Vodafone)
*#21#
check the number that "All Calls" are diverted to
*#2640#
 phone security code in use
*#30#
 see the private number
*#43#
 "Call Waiting" status of your cell phone.
*#61#
check the number that "On No Reply" calls are diverted to
*#62#
check the number that "Divert If Unreachable (no service)" calls are diverted to
*#67#
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
*#7760#
Manufactures code
*#7780#
Restore factory settings
*#8110#
Software version for the Nokia 8110
*#92702689#
 Displays - 1.Serial Number, 2.Date Made, 3.Purchase Date, 4.Date of last repair , 5.Transfer User Data
*#94870345123456789#
Deactivate the PWM
**21*
number# Turn on "All Calls" diverting to the phone number entered
**61*
number# Turn on "No Reply" diverting to the phone number entered
**67*
number# Turn on "On Busy" diverting to the phone number entered
12345
Default security code of nokia
press and hold #
Change calling lines from one to another