PHONETRACKER application informs and keeps track of your lost phone. Features offered by this applications are : 1. User receives text message when someone changes the SIM in phone. 2. Text message contains location address where the phone is. 3. Text message also contains a web link which will redirect you to google maps and show the exact location of the phone on map. 3. User is provided with option to receive incoming and outgoing call details after someone changes SIM. 4. It requires password authentication. 5. User can receive password through SMS if in case user forgets password.