We have AT&T and bought $90 worth of Text and Talk minutes for Canada. The phone was a brick and a complete disapointment. As far north as Watson Lake we had zero service from it. At the visitor center, the ladies there said AT&T phones don't work the whole length of the Canadian portion of the Alaskan Hwy. I got online with AT&T from there and they removed the text/talk package and credited it back without a hassle. We have had good luck using wifi from visitor centers so far, but don't count on your AT&T phone. And be sure to put your phone/ipad on airplane mode!
