How many networks can an unlocked iPhone use?

I'm currently on vodaphone uk and am going to be getting my iPhone 5 unlocked so I can use an American SIM card as am going to be visiting for 3 months. I was just wondering when unlocked will the phone be restricted to a certain amount of networks vodaphone and the new American network or will I be able to use lots of different sims?

You will be limited to GSM carriers.

AT&T Prepaid: http://www.att.com/...plans.html
T-Mobile Prepaid: http://prepaid-phones.t-mobile.com/prepaid-plans

Hope this helps!

All GSM networks would be accessible when you unlock the phone. In the US the 2 major GSM carriers are AT&T & T-Mobile.

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