Hi All

i'm looking for some assistance / guidance if you can help?

I have a Nokia Lumia 620 locked to O2 which I would like to unlock in order to give it to a friend abroad. I have searched around and seen various sites offering an unlock service but a bit weary of using any of these services tbh. I have contacted O2 themselves using the Unlock form in this thread but they have replied stating that the info I have provided is incorrect (im guessing its the phone number the phone used to be on with O2 before it was ported to EE, and as it has not been in contract with them) so essentially they aren't going to help. Can anyone offer any suggestions on a reliable service to use? I have found one linked from the GiffGaff site called myphoneunlockcode.com which will charge £26.60 for the code. I don't mind paying this if its sure to work. Anyone used this or any other service they could recommend?

thanks in advance