Many a times we either give our phone to repair shops or sell them online. We do make sure to delete the photos we have in the gallery or the phone memory. Before giving we do make sure to delete whatever personal things we have stored in it.
But how much are we sure that what we have deleted has actually been erased? We have seen a lot of cases in films or dramas where some techies easily bring back the deleted evidence. Have you ever given a thought whether it is really possible? If so, how is this possible?
To answer all your doubts related, go through this video.