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