Did you ever know that when you delete any data it is not actually not deleted!
Yes! I am not joking. Actually what happens is that it just does not acquire that space no your pc or your device. There are various means to get it back. Many companies are trying to solve it as this can cause you a lot of Problem.
If you deleted all your contacts , call history and messages as your are trying to sell your mobile phone to someone but what if he has that software and then he will get back all the data you deleted from your cellphone and he may blackmail you.
Till now there is no possible way to prevent it but experts are trying to find a solution.
