"From the point of view of a regular user, all this problems with the iPhone 5/sprint and outside US are very contradictory to the simplicity Apple tries to accomplish for their users.
I didn't know about any difference of the iPhones sold in US. I asked to salesmen in Apple Store in Miami and they told me that if I bought at full price it would work outside US. My cousin could get one iPhone/sprint at Apple Store but I arrived later and could not find.
I found an available iPhone at radioshack and ask for one. And paid the full price. People there told me it would work in Brazil. But when I arrived home I tried to activate it and it would not activate. Neither with sprint chip nor with my local carrier (Vivo). I tried to restore and nothing worked.
I called Apple Brazil and they told me it was not their responsibility. I called Sprint and the answer was a very direct "we won't help you". I called Radioshack and they told me they can't do nothing, they only sell iPhones and don't know anything about carriers, etc.
I listened to Apple employes and bought an iPhone the way they suggested but ended with nothing but a "new ipod touch" 5. My cousin bought the iPhone at Apple Store, trusting the vendors and ended with an iPhone that cannot send SMS and cannot activate facetime.
This was a very unpleasant experience with an Apple product and now I have nobody to help me. Radioshack, Sprint and even APPLE don't even care about my problem and there is no official way to solve it! Nobody wants to be responsible for that!
As I live in Brazil, I can't return my iPhone to Radioshack or Apple.
Any suggestion????"