If your mind is criminal then you should sure and had to worry about these kind of issues.
It is impossible to erase data while you are giving mobile to repair because no one have time to shift data on storage devices as you found your device faulty.

So whom are adicated and found these kind of shameless act they should think what they are going to do? Are they doing justice with their work which is the only way of earning for them for their families back to their country?