Originally Posted by snrb
The app does need a data connection. If you disconnect from WiFi the app will sign out. The app will sign back in if you get data connectivity back. If you have the full version of the app and a data plan you can enable "Allow 3G/4G Calling" and the app will then sign on using your mobile data connection.
Any chance for a seamless hand-off between 3G/4G data and wifi? Ideally, I'd like to walk in and out of a wifi hotspot without having to redial. I have the "Allow 3G/4G calling" enabled.