i have a galaxy s2 and i am a bit concerned about its security.i want to know what should i do in order to track my phone if i lost it?do i need to download an app or i have to register on google for this???i have avg free antivirus in my mobile and i have registered for anti-theft services in it but i think most of these anti theft services require GPS on the mobile to be ON.Isn't there any app which i can turn on from my google account and then it will turn on the GPS on my phone or any other good anti theft apps or services available?