Method to format Nokia N-series mobiles..... 1. Switch off the phone. 2. Hold down the following three buttons: Green (call answer button, * button, and ‘3′ button. 3. While holding these buttons, press the power button and switch on the phone. 4. When the message ‘Formatting’ appears on the screen, release all of the buttons. Method: 2 ( Hard Format) 1. Switch off the phone. 2. Hold down *#7370# button. 3. While holding these buttons, press the power button and switch on the phone. 4. When the message ‘Formatting’ appears on the screen, release all of the buttons. Method: 3 Soft Reset 1. Switch off the phone. 2. Hold down *#7780# button. 3. While holding these buttons, press the power button and switch on the phone. 4. When the message ‘Formatting’ appears on the screen, release all of the buttons. Trick to increase speed of N73!First go to ur To-do List. Make a note and input as follows Subject: Speed Due Date: 29-01-2005(dd-mm-yy) Priority: set to High then press Done Go to option again and make a second note and input as follows Subject: Qoukie Due Date: 29-01-2005(dd-mm-yy) Priority: set to Low then press Done Nokia secret codes ! On the main screen type in: *#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. #pw+1234567890+1# Shows if sim have restrictions. *#92702689# - takes you to a secret menu where you may find 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. Increase signal strength, better signal reception. It also help 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 less 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 the lock code. Default lock code is: 12345 Press *#3925538# to delete the contents and code of wallet. Unlock service provider: Insert sim, turn phone on and press vol up(arrow keys) for 3 seconds, should say pin code. Press C,then press * message should flash, press * again and 04*pin*pin*pin# \ *#7328748263373738# resets security code. Default security code is 12345 Change closed caller group (settings >security settings>user groups) to 00000 and ure phone will sound the message tone when you are near a radar speed trap. Setting it to 500 will cause your phone 2 set off security alarms at shop exits, gr8 for practical jokes! (works with some of the Nokia phones.) Press and hold "0" on the main screen to open wap browser. Thanks.