At&T because they have the I-phone. Everyone I work with has them and loves them. They are superior to any other smart phone. I don’t know what AT&t’s International data plan is but it’s expensive I’m sure. You can use WiFi though so you can get by with the domestic plan if you can find WiFi access.
“They are superior to any other smart phone.”
The HTC HD2 makes the iphone look like a tin can with a string attached.