am looking for help here regarding my current contract phone (Samsung Jet) which I recently upgraded to with carphone warehouse(online). The sim card/network is through O2 and I wanted to change the Samsung phone to an i-phone and use my current O2 sim card.
Would I be able to do this and would i need to have an unlocked iphone or have to buy one that is tied to O2.
I dont want to buy an iphone off ebay and then find it doesn't take my contract sim card
Any help here would be much appreciated