Report "Hi, I have bought a HTC HD2 from Ebay. It was originally on O2 but was unlocked by the previous owner. I am trying to work the phone for my first time using my 3 sim card. However the phone is asking for a PIN number. The previous owner does not know the pin and he performed a master reset before he sold it. I have tried the usual generic codes 1234 and 0000 but I only have one attempt left. Please can anyone help?"