Sensation and wifi problems
I think the problem is that the software that decides to connect to wifi or via cell tower is confused. I have problems and if I change the setting to allow only wifi, the problem seems to be solved. I had difficulty finding the setting for this feature since you have to navigate to the wifi calling app, then hit the menu button below the screen. Select settings, connection preferences and select wifi. To get this menu, wifi calling must be enabled though. post if this fixes your problem.