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O2 IPhone 4 will it work with AT and T sim


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will1407

 
Member Since: Apr 04, 2011
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Hi
I am going on holiday for 3 weeks to america shortly, and do often. I currently have a iPhone 4 on O2.
If I purchase an AT and T sim will it work in my phone?
O2 will rip me off with call prices any suggestions?
Cheers
Will
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If you bought the iPhone straight from O2 then it will be locked to only using their network. The only option would be to look into Jailbreak/ Unlock.

My suggestion... get a cheap PAYG phone on AT&T for while you are over there.

HTH,
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Or, get an unlocked iPhone 4, which should then work with the AT&T sim card. Just make sure the unlocked iPhone is using GMA. (Which is what AT&T uses.) German T-Mobile unlocked iPhones work in the US with an AT&T sim card.
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Yes, all european (GSM) iPhones you've bought outright will work with AT&T (calls and 3G data) and T-Mobile (calls & slower EDGE data).

However if you got your iPhone on a contract, you can't just swap the SIM unfortunately. You could either pay roaming costs (expensive) or just stick to making voice calls and use wifi wherever possible.
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