for AT&T customers like myself this is HUGE! up until now they had the passport option which was ridicules.
i just used this plan in Germany, Belgium and Switzerland.
1. you use the plan you have, i have the business unlimited so this was great
2. you pay per 24hr not per day, i didn't pay for shabbos!
3. once its added to your number you never have to call before your trip!
International Day Pass AT&T