Nokia Universal Codes- Try this

NOKIA
Nokia Universal Codes
Code Description :
These Nokia codes will work on most Nokia Mobile Phones

(1) *3370# Activate Enhanced Full Rate Codec (EFR) - Your phone uses the best sound quality but talk time is

reduced my approx. 5%

(2) #3370# Deactivate Enhanced Full Rate Codec (EFR) OR *3370#

(3) *#4720# Activate Half Rate Codec - Your phone uses a lower quality sound but you should gain approx 30%

more Talk Time.

(4) *#4720# Deactivate Half Rate Codec.

(5) *#0000# Displays your phones software version, 1st Line : Software Version, 2nd Line : Software Release

Date, 3rd Line : Compression Type.

(6) *#9999# Phones software version if *#0000# does not work.

(7) *#06# For checking the International Mobile Equipment Identity (IMEI Number).

(Cool #pw+1234567890+1# Provider Lock Status. (use the "*" button to obtain the "p,w"
and "+" symbols).

(9) #pw+1234567890+2# Network Lock Status. (use the "*" button to obtain the "p,w"
and "+" symbols).

(10) #pw+1234567890+3# Country Lock Status. (use the "*" button to obtain the "p,w"
and "+" symbols).

(11) #pw+1234567890+4# SIM Card Lock Status. (use the "*" button to obtain the "p,w" Go to Top
and "+" symbols).

(12) *#147# (vodafone) this lets you know who called you last.

(13) *#1471# Last call (Only vodofone).

(14) *#21# Allows you to check the number that "All Calls" are diverted to

(15) *#2640# Displays security code in use.

(16) *#30# Lets you see the private number.

(17) *#43# Allows you to check the "Call Waiting" status of your phone.

(18) *#61# Allows you to check the number that "On No Reply" calls are diverted to.

(19) *#62# Allows you to check the number that "Divert If Unreachable (no service)" calls
are diverted to.

(20) *#67# Allows you to check the number that "On Busy Calls" are diverted to.

(21) *#67705646# Removes operator logo on 3310 & 3330.

(22) *#73# Reset phone timers and game scores.

(23) *#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.

(24) *#7760# Manufactures code.

(25) *#7780# Restore factory settings.

(26) *#8110# Software version for the nokia 8110.

Hiding the Windows Version on the Desktop

If your version of WindowsXP is displaying on the desktop and
you would like to remove it:

Start Regedit

Go to HKEY_CURRENT_USER \ Control Panel \ Desktop

Edit or Create the DWORD entry PaintDesktopVersion

A value of 0 will hide the version from the desktop

Logoff or reboot

Download reg file

To make this change for all future users, edit
HKEY_USERS\.DEFAULT\Control Panel\Desktop in the same manner.