NOKIA MOBILE PHONES SECRET CODES AND THEIR FUNCTIONS

On the main screen type of your phone.just type any of the below codes for their specifications
*#06#: for checking the IMEI (International Mobile Equipment Identity).
*#7780# :reset to factory settings.
*#67705646# This will clear the LCD display(operator logo).
*#0000#: To view software version.
*#2820# Bluetooth device address.
*#746025625# Sim clock allowed status.
*#62209526#: - Display the MAC address of the WLAN adapter. This is available only in the newer devices that supports WLAN like N80 and other symbian phones
#pw+1234567890+1#: Shows if sim have restrictions.
*#92702689# :takes you to a secret menu where you may find some of the information such as the: ==>1. Displays Serial Number. ==>2. Displays the Month and Year of Manufacture ==>3. Displays (if there) the date where the phone was purchased (MMYY) ==>4. Displays the date of the last repair - if found (0000) ==>5. Shows life timer of phone (time passes since last start)
*#3370#:Enhanced Full Rate Codec (EFR) activation. And also Increase signal strength, better signal reception. It also help you to use GPRS if the service is not responding or too slow. NOTE:Phone battery will drain faster though this process
*#3370*:(EFR) deactivation. Phone will automatically restart. Increase battery life by 40% because phone receives less and weak signal from network.
*#4720# - Half Rate Codec activation.
*#4720* - Half Rate Codec deactivation. The phone will automatically restart If you forgot wallet code for Nokia S60 phone, use this code reset: *# 7370925538#

Note: your data in the wallet will be erased. Phone will ask you for your lock code.you can use the Default lock code is: 12345

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Press *#3925538# to delete the contents and code of wallet.
*#7328748263373738#: resets security code.
Default security code is 12345 Unlock service provider: Insert sim and switch on your phone and press the volume + key up for 3 seconds, incase, your phone should request pin code. Press C followed by the *key. A messege pop up will alert, press the *key again and dial 04*pin*pin*pin#
. To Change closed caller group, go to settings >security settings>user groups to 00000 and phone will recieve a messege alert when you are on a slow radar speed trap. Setting it to 400 will cause your phone 2 set off security alarms at shop exit.