Here's Nokia Secret Codes And Tricks.

On the main screen or standby, type any of these codes to use them.

*#06# – this displays the unique serial number or IMEI number of your phone

*#0000# – it displays the firmware or software version details

*#2820# – displays bluetooth (BT) device address

Press and hold the ZERO (0) button – starts your default browser and launches your defined hompage

Press and hold the MENU button – This starts the phone task manager where you can switch between running applications. Pressing the CANCEL (c) button terminates a running application.

*#7780# – This Restores user defined settings to factory default settings. Programs, calendars, and contacts are unchanged. You will be ask to input your security or lock code to proceed with the restoration.

*#7370# – Reprograms your phone memory to factory default. all files will be deleted. you will be ask to input your security or lock code to proceed with the phone memory format. backup your messages, contacts, and other important data before proceeding. NOTE: this is equivalent to hard format for Nokia Series 60 1st edition phones (N7650, N3650/60, N-Gage/QD). If you are using Nokia Series 60 2nd and 3rd edition phone (N6600 and above), this code will not fully format your phone memory, you need to do the hard format (4-keys combo code) instead.

Nokia Code function

*3370# This Nokia code activates Enhanced Full Rate Codec (EFR) - Your Nokia cell phone uses the best sound quality but talk time is reduced my approx. 5%
#3370# Deactivate Enhanced Full Rate Codec (EFR) .
*#4720# Activate Half Rate Codec - Your phone uses a lower quality sound but you should gain approx 30% more Talk Time.
*#4720# With this Nokia code you can deactivate the Half Rate Codec.
*#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# This lets you know who called you last (Only vodofone).
*#1471# Last call (Only vodofone) .
*#21# This phone code allows you to check the number that "All Calls" are diverted to.
*#2640# Displays phone security code in use .
*#30# Lets you see the private number.
*#43# Allows you to check the "Call Waiting" status of your cell 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# Phone code that 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# Software version for the nokia 8110.
*#92702689# Displays - 1.Serial Number, 2.Date Made, 3.Purchase Date, 4.Date of last repair (0000 for no repairs), 5.Transfer User Data. To exit this mode you need to switch your phone off then on again.
*#94870345123456789# Deactivate the PWM-Mem.
**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 This is the default security code .
press and hold # Lets you switch between lines.