Do you use and android and don't want to loose your phone then you need to read this article step by step
All you need to do is to download any of this application
1. SeekDroid: SeekDriod which cost about $4.99 but don't get pernic you can read my post on how to get a paid application for free
here, SeekDroid is one of the oldest find my phone application that allow you remotely control your GPS and also helps you wipe both your internal storage and memory card (SDcards) remotely and prevent thieves from uninstalling your applications.
2. Lookout Plan B: Lookout plan B is one of the only application that automatically track your android phone and send you the location even its just pre-installed on your phone.
3: Find My Phone: find my phone is a free application that's good for families in case like when ever you want to track where your kids are at a particular time and also it can help you track your phone from another persons phone as far he has you on his list.
4: Norton Anti-Theft: Norton anti-theft helps you upload photos to Norton website that can help you track your phone.