How to use a German iphone in the US?

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I am hosting a German sell tyro here in a US. She brought an iphone from Germany. It is 3GS. The phone will take incoming calls though she cannot call out. It picks up Att as well as Tmobile.

company with prepaid unlimited data?

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I have prepaid bureau unbarred iphone 3g, which is upon att prepaid service. though they dont suggest a total interpretation upon there prepaid phones. does any one know a association which does

unlocked iphone 2g Carrier (null)(null)?

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I have the iphone 2G which we only unbarred ,but we don,t know if we did it right it has this thing which says "no service" When we put my att card! Or it only migh be since we ‘m

ipad in spain (europe)?

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Ok, so i am starting to spain with my 3g ipad shortly as well as i do not wish to be charged the crap bucket for the little general att devise which won’t work. we know the ipad uses the

Help!! IPHONE 3G PREPAID?!?

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ok so if i get the unbarred iphone 3g, is it probable to make make use of of tmobile prepaid sim card, as well as Att Pay as we go sim card? as well as if im means to make make use of of both of