Earlier today we heard that both Sprint and Verizon will offer an unlocked micro SIM in the iPhone 4S, which would allow you to use your iPhone 4S abroad with a GSM SIM card.
Now it would appear that this wont be the case from Sprint, and Sprint will instead support international roaming on GSM networks, which means you will probably end up having to pay high roaming fees when you use your iPhone 4S.
