In this application when the user installed then it asked about the name, contact no. , application password, phone password, sim password. If the user lose there mobile then it call from those number which was stored at installed time.  If it can’t picked at three times then it getting locked. If some found mobile then it will ask all three password. If another user doesn’t know about than password then they can’t use that mobile. It will also display the owner mobile no after getting locked.