I've been trying to see how easy it is to get my iphone 5 unlocked, but I keep reading conflicting posts. I don't know the history of the phone and I don't have the original SIM, but I was told it was on O2-UK I want to know: 1. Can my iPhone 5 6.1.3 be unlocked? 2. Is there a free way? I had a local company quote me £95 3. Does it have to be JB-ed? 4. If it's possible to unlock it, will software updates lock it again? Thanks for looking!