I had problems with the app, so I sent a text message, never had any problems with messaging.I had problems with it in a rural airport. switched to ATT and that helped, but I've always had synce issues with the app. I never trusted it at all.
I'd think it's on, app shows on and it's off at the plane. turn it off and click, it pops on. it was all the time.
It's a great product t but lacks reliability in the control.
Mines in a box somewhere now.