I am no Mobile phone tech head so do not want to look silly asking in a shop. Can i use a Iphone on the vodaphone network? I have a supplied work phone with a vodaphone contract,not pay-as- you go. I wondered if i can buy a iphone and put my sim in? I have no idea if i can buy a pay as you go and do that are does the phone need to be unlocked etc.Any info would be great.