Worst app ever

This app never works. This is extremely frustrating, as I paid for international service through AT&T and was told I could use this app for wifi. Ive been in Australia for 2 weeks and havent been able to get this app working even after reading all instructions and turning off iMessage. This app is garbage. When I return to the states I intend to revisit that AT&T store to let them know they need to stop advertising an app seemingly no one can make use of. Ridiculous and unacceptable.

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