Note to iPhone users that are about to travel internationally, along with a word of caution..
Before heading to Mexico, I paid $24.99 to include 20 MB of international data. Before my trip ended, AT&T send me a text message alerting me of me having gone over my 20 MB.
What?!
I confirmed with the AT&T rep before leaving that I use, on average, 20 MB total for the month. Turns out, I was sending pictures with my iPhone from Mexico, which cut into my 20 MB. I ended up going over my allotment by approximately 10 MB. Terrific. I will now owe $30 or so in data overage charges.
Another tip? Be sure to ask about International calling rates. I paid $4.99 to include a $.59 per minute call plan from Mexico, versus $.99. Now I have to wait a few weeks to cancel the new International plan and data roaming plans....definitely worth the effort, albeit I only needed these services for a week.