Less than half the calls come through and show up 12 hours later as missed calls. Same with text messages. 5 - 12 hour delays on messages. Unless I remember to open the app every hour or so the calls get missed. Played around with the screen lock and other settings as suggested in help forums. Doesn't help. Fongo works fine with wifi and cell network. TextNow does not. Update: I have tried all the troubleshooting steps provided in the forums. Unless I clear the app data everyday. I will miss calls. That's been the only solution. Remembering to clear the app and loging back in daily. Will only ever use this as a secondary backup phone. Do not rely on this service for anything important. You will regret it.