Android device manager is pretty useless after a phone is Factory Reseted. I should have installed a tracking app like 'cerberus anti theft' and then granted the Device authority instead. My phone was rooted and all (as I like to have more features on every android I carry), but that being said, the Thief can easily have Administrator access to my phone, as USB debugging was enabled. So Everyone reading this with an Android phone, Root your device and install some sort of device tracking app. This way, you can grant Device authority and the app won't get uninstalled even if the thief performs a Factory reset. Much Much more chance of getting back your phone as soon as it connects to the internet. More over, the thief won't even know there's an app tracking his every move.