Blackberry help

Very interesting, thanks. But my biggest concern is this: I live in the UAE and my fiance is in the states. Over there, their cells r connected to some particular service. It’s the whole package deal. So what should I do in this case? Should I still get him one and pray that it works in the states. What should I consider as far as the network is concerned?

Much appreciate
Jazak Allah Khairun

Nadia