Will a UK iPhone 5 work in the US?

Hi there,

With all the talk about these "international phones" that have 2 radios and everything, it got me wondering if my UK iPhone 5 will actually work in the US.

It's the model A1429 and since it works in the UK I'm assuming it's the GSM one.

Cheers all!

Applejuiced said:

If its an unlocked iphone 5 it will work with any GSM carrier in the US.
If your i5 is locked only to your current provider then it wont work with any other sim anywhere.

Click to expand...

Oh I forgot to mention I'm just travelling, so I won't be using any special SIMs or anything. I know that might make my question sound pointless / stupid but I just wanted to be sure. So I know my carrier (ThreeUk) has roaming charges for the US.

On that basis, I have a few more questions:

1) How can I tell if my phone is locked? I bought it sim-free from Apple and am using a monthly rolling (cancel at any time) usage contract. I'm assuming it's not locked...

2) Do AT&T do any good SIMs for about 5 days of usage, or are there any calling cards or discount SIMs that I can use?

Thanks.