*2820# TO KNOW YOUR UNIQUE BLUETOOTH ADDRESS *#9999# or *#0000# TO KNOW WHEN YOUR MOBILE SOFTWARE WAS INSTALLED *#06# TO KNOW THE SERIAL NUMBER OF YOUR MOBILE *#92702689# TO KNOW THE LIFE TIMER OF YOUR MOBILE (UNLIKE LIFE TIMER IN MOBILE'S LOG THIS CANNOT BE RESETTED) NOKIA RADAR IN SOME MOBILES THERE IS A SPECIAL SETTING IN NOKIA PHONES THAT SHOWS RADAR CONTENT ON STANBY SCREEN (NOTE:- BEFORE PROCEEDING MAKE SURE SCREEN INFO DISPLAY & ACTIVE STANDBY ARE DEACTIVE) GO TO SETTINGS --> SECURITY SETTINGS --> PHONE & SIM(ONLY IN N-SERIES) --> CLOSED USER GROUP SELECT ON AND WRITE THE GROUP NUMBER "00000" WITHOUT INVERTED COMMAS. & YOU ARE DONE