Hi friends do you have a phone from NOKIA, then here are some secret codes. Note the information provided below is not verified fully so please be careful while trying these codes.
On the main screen type :
*#06# - for checking the IMEI (International Mobile Equipment Identity).
*#7780# - reset to factory settings (don’t do this if you are not sure).
*#67705646# - this will clear the LCD display (operator logo).
*#0000# - to view the software version.
*#2820# - Bluetooth device address.
*#746025625# - sim clock allowed status.
#pw+1234567890+1# - shows if sim have restrictions.
*#92702689# - takes you to a secret menu where you may fine some of the information below:
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. Increases signal strength, better signal reception. It also helps if u want to use GPRS and the service is not responding or too slow. Phone battery will drain faster though.
*#3370* - (EFR) deactivation – Phone will automatically restart. Increase battery life by 30% because phone receives fewer signals 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 to reset: *#7370925538#
Note, your data in the wallet will be erased. Phone will ask you the lock code. Default lock code is: 12345
Change closed caller group (settings->security settings->user groups) to 00000 and your phone will sound the message tone when your are near a radar speed trap. Setting it to 500 will cause your phone 2 set off security alarms at shop exits, (works with some NOKIA phones) press and hold “0” on the main screen to open wap browser.