Second hand iPhone 3g 16gb Wont activate
I signed up for a iPhone 3g 18 month contract in March when I first turned 18 anyway I recently broke that phone in my local nightclub so I managed to purchase a second hand iPhone 3g 16gb , I took the pay monthly sim from my old iPhone and tried it in this second hand iPhone but the phone won't activate. I left it for 4 hours to no avail I went into the 02 shop and they couldn't understand why the phone wouldn't activate which was a great help. The previous owner did said it was working before he tried to unlock it I've tried full restore , Network restore and still nothing.
Does anyone know why this phone won't activate I'm really desperate for this as I'm going away soon?