Does doing a "Factory Reset" actually wipe all the custom data off the internal memory of a phone, or just "Delete" it, as in delete the FAT records for those file but not actually wipe over the data? I am going to sell my old Google G2, and did a factory reset, but am not sure if the data has actually been 'physically' overwritten. I've looked at wiping apps on the play store, like one called "SHREDroid", but from the reviews it looks to be buggy. This is with an un-rooted phone. Thanks EDIT: Is this:: a necessary or good step to perform after doing the factory reset? "settings> sd card and phone storage> tap, "unmount phone storage", then tap "format phone storage"." EDIT: Doesn't look like my G2 has that "format phone storage" option, so nvm.