Switching simm cards
I have an iphone 4 and I live in Japan. I was wondering how or if I can take my phone to the states and get a simm card in the states for my phone and will it work. I have done some reading on line but still a little confused at what I'm seeing. I heard about un-locking the phone or I have to jail-break it in order for it to work .....I know I don't want to jail-break it. Anyone ever try this??and did it work?
iPhone 4, iOS 5.0.1