OTT
This is outrageous, but as the article suggests - use an over the top service like internetcalls.com (or one of the many,many clones run by Dellmont, see http://backsla.sh/betamax) for international calls.
They have a handy app called MobileVOIP for iOS and Android.
They also have landline access numbers via which calls can be made using your phone plan free minutes instead of a flaky data connection.
