Originally Posted by NJBlackBerry
Another opportunity - when I travel to SE Asia, I use a local SIM card that has BB service on it (a corporate account). That way I do not pay roaming charges on the data. I have a cheap unlocked phone that I use with my "normal" SIM card for incoming voice.
Great point. This is a good example of why having an unlocked phone is a must for the international traveler. I use a slightly different arrangement than NJBlackBerry, but the result is the same: inexpensive international usage.
If you're happy with your carrier and international use of your BlackBerry isn't necessary, then you're fine with a locked device. Basically, if you have to ask, you probably don't need it.