O2

Hi,I'm not on here very often, anyway I have an annoying problem with my upgrade phone I had in April, which is the above.This morning it was working fine I had cortana telling me about my messages etc, all the norm, then I wanted to change my screen...

I had a simple problem with my phone so I went on line & asked an 02 guru for help with my volume control button, I then followed what was supposed to be an easy video, but then I lost all my personal details, everything has gone on my handset all my...