I have a bit of an issue with my old Sony Xperia Z phone. A couple of months ago I lent it to a friend (now ex friend) who decided she would change the pattern lock. When she returned the phone she did tell me the pattern, but as I now have a new phone I had no need to use it so after a while I forgot what it was (so did she). As well as that she lost the sim tray so I am unable to put in a sim card. This means I have no internet connection so unable to use the 'Forgot your pattern?' option.
When I connect it to my computer it isn't even recognised.
I have looked at so many pages trying to help people with the same issue and finally gave up on the idea of restoring all my pictures etc.
However, I now want to sell it and even the Factory/Hard Reset does not work.
Can anyone help me with how to factory reset it please? I am going out of my mind about this. I do not understand how difficult it can be to reset your phone...
All your help will be much appreciated.
Thanks in advance.