Cerberus does all of the things mentioned in this thread except create a hidden partition and survive a new rom flash but does survive factory resets.
If the person was tech savvy enough to flash a new rom then they are tech savvy enough to change the IMEI to circumvent blacklisting. The reality is that the vast majority of people would at most do a factory reset on a stolen device.
XDA Developers was founded by developers, for developers. It is now a valuable resource for people who want to make the most of their mobile devices, from customizing the look and feel to adding new functionality. Are you a developer? | Terms of Service