Sim. Ålguém já pensou nisso:
All devices sold by Cingular/at&t are sim locked and only accept at&t sim cards. If you want to use an at&t device with one of your local providers such as Claro, Tim, Oi, etc. you would need to find a way to have the devices unlocked to allow you to put in a local sim card. It is not always easy to get the official unlock codes from at&t unless you are an active customer with a US address. There are however many third party services that you can search via google and on ebay to help you with the unlock process. As the iPhone is so new and is not yet released no one yet knows for sure if it can be unlocked and which features might work with an alternate providers sim card.
The iPhone will eventually be sold in Brazil for local use but no one knows how soon.
É só esperar…
Referência.
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