AT&T wireless customers can now make unlimited calls to 70 different countries when they add AT&T World Connect Advantage to their domestic postpaid wireless plan for $15 a month per line.
The World Connect Advantage plan gives users unlimited calling to Mexico and Canada, but does have some limits. Unlimited calls to landlines extend to 70 countres, but calls to wireless lines only apply for 36 countries. Along with that, there are discounted per minute calling rates to another 155 countries. For a full list of countries and per minute costs, check out the World Connect Advantage site.