AT&T international rates

It depends which of two products you mean, and the search term covers both. Calling another country from the US is international long distance: AT&T sells an add-on called AT&T International Calling at $15 a month per line, and without it you pay per use at a rate set per country that AT&T does not publish as a table. Using your own phone while you are abroad is roaming, billed at $2.00 a minute in Canada and Mexico and $4.00 a minute everywhere else.

AT&T publishes pay-per-use travel rates of $2.00 a minute in Canada and Mexico and $4.00 a minute in all other countries, including on cruise ships and in the air. Texts are $1.00 each, picture or video messages $2.00, and data $2.05 per megabyte. These apply when you have not bought a travel package.

If you call one country regularly from a US AT&T line, usually yes. $15 a month buys unlimited calling to 85+ countries, which no per-minute service can beat for a heavy caller. It needs a domestic postpaid plan with unlimited talk, it only helps for calls placed from the US, and it is $180 a year whether or not you use it. For an occasional caller, paying per minute is the cheaper shape.

For voice calls, yes, and this is the case where the arithmetic is not close. Our published rates are per minute with no monthly fee, and 481 of our 482 published bands sit below the $4.00 a minute AT&T charges to use your phone outside Canada and Mexico. A browser call needs wifi rather than a mobile network, so it does not touch a roaming bill at all. It will not reach emergency services, so keep a working phone.

Yes. Both the calling add-on and the pay-per-use travel rates are features of an AT&T line and are billed to it. On another carrier, a local SIM bought abroad, or no phone at all, none of them applies to you.