Following discontent from customers who have encountered costly charges for browsing the Web and checking email on their iPhones while outside the U.S., AT&T has announced a pair of flat-rate international data plans starting at just $25 per month.

A new $60 Data Global Plans will offer iPhone users just 50MB of data transfer in more than 29 countries, including Canada, China, Mexico and in areas throughout Europe and Asia.

The plan, which must be purchased in addition to the domestic voice and data iPhone plan acquired during iPhone activation, also enables international voice and data roaming, as well as international long distance dialing from the United States at standard rates.