For calls from the U.S. to Thailand, you can drive that rate down to $0.08 (eight U.S. cents) per minute - to a Thai mobile - with a 1,000 minute ($40) pre-paid calling card. This does not cover any per minute fees you might incur calling the AT&T toll-free access number.

You can buy pre-paid AT&T calling cards pretty much anywhere, including a 'virtual' card on-line: https://att.ecustomersupport.com/ATT...roductLineID=2