*#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.

*#7370# for formatting mobile.

*#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.

#pw +1234567890+1 # Shows if sim have restrictions..

Some process for formatting the s60

Method->1

Make sure you phone is fully charged. Backup your contacts list and personal files to MMC memory card (if possible). Switch off your S60 phone. Press and hold these three keys together: Green dial key, Star key (*) Three key (3) Press the power on/off to swtich on the S60 phone. Do not let go the three keys until you see the "formatting" screen displayed Wait a few minutes until the format is complete. Your S60 will now be at its original factory settings

Method->2 Be4 u format your phone, make sure you back up all your ringtones, SMS and picture messages and most importantly yout contacts. You can use the Nokia PC Suite to do this. Once you've done this, key in *#7370#. It will immediately prompt you to restart your phone. Select 'Yes' and the phone will restart after formatting. It takes about 2 to 3 minutes to complete the process. Also ensure that your phone is well charged before you format. Now restore all your ringtones, mesg

Additional info: U can use *#7780# 2 4mat ur ph0ne f *#7370# dont w0rk.. And diz codes requires ur security code s0 make sure u knw it..