Mediocre But Necessary

Well, if you are an ATT subscriber, then this is the only method for connecting to international WiFi spots. In that sense, it is a nice feature.

Unfortunately, there are many limitations. Coverage is poor (nothing in Heathrow, for example) and it doesnt function on any device that isnt already connected to ATT network such as a WiFi only iPad or a Win10 Surface PC.

This service could be really nice but implementation is well below alternative options.

moirty about AT&T Global Wi-Fi, v5.2.28