It is possible to retrieve the previous owner’s data from an Android phone, even if the phone has been reset to factory settings. The basics of information security include that a device that is sold or given away to another person is first restored to its factory settings. This applies to both computers and smartphones. However, contrary to popular belief, restoring from a smartphone equipped with the Android operating system does not delete all data. It is still possible for the next owner, who is ill-intentioned or otherwise just inclined to snoop, to dig up information about the previous owner from the phone.
ttn-54
Sold your old Android phone on? This is what you didn’t want to know
