I cracked the glass on my Samsung S3 Android device, so had to return it when I received my new one. I never did find a way to reset it back to factory default. I searched for an hour and tried a few different cookbook steps. None were entirely successful.

I ended up deleting everything I could manually. But, since it's flash memory, that means that only the pointers to it were deleted. The information itself is probably still in there.

For 99.99% of these kinds of situations, that's probably sufficient. It would take a moderately sophisticated snooper to even figure out the information is there, let alone dig that stuff out. And, if they get a high volume of phones, chances are they have easier targets to spend their time on.

YMMV. The security of deleting the information will vary from one device to the next.

Drake Christensen