My SGS3 was stolen yesterday at an amusement park and I had no tracking device apps on it prior but I have downloaded several via Google Play such as Cerberus Anti-Theft, Android Lost, WheresMyDroid... none have worked!!! I tried download Plan B but it was not compatible with my version. So my question is, are there any apps I can download AFTER my phone has been stolen??? Something like Plan B. PLEASE HELP.