If you want to use phones with
sim (In the states) cards,
GSM phones from T-Mobile and AT&T are what you'd look to. Nextel phones also have
sim cards and the only Sprint phone with
sim cards (making them world phones) I believe is the
BlackBerry 8800 series. You'd be able to swap the
sim card out and use them in other countries.
I'm just going by memory
