Currently Being ModeratedDec 20, 2012 1:19 PM (in response to Sgt.Trojan)
What wjosten said. However, there is a language issue here: SIM Free is not the same as Unlocked. A SIM free phone is unlocked until you put a SIM in it. From then on it is locked to the carrier of that SIM. Unlocked allows you to swap SIMs. So you need an Unlocked phone, not a SIM Free phone.
Currently Being ModeratedDec 20, 2012 1:29 PM (in response to Sgt.Trojan)
And to follow on from what Lawrence said, the only place you can get an unlocked iPhone in the UK is from Apple directly, either the online Apple Store or the retail stores. Do not buy from Carphone Warehouse. They will tell you that their iPhones are unlocked but that is not true; the iPhone will lock to the first carrier whose SIM you use.
Currently Being ModeratedDec 20, 2012 1:54 PM (in response to Lawrence Finch)
Great advice. Thanks guys. I don't fancy having to pay £600 for a phone bill again and I've hit a brick wall with Orange/ Phones4u trying to get it unlocked 4 months into a contract.