When I answer incoming calls, the phone does answer, but then the screen does black. It does not allow me to mute nor see the touchpad, so I cannot enter my code to get onto the VPN for work. This has happened even after deleting the cache. Editing to add: I have also restarted the phone many times and uninstalled and reinstalled the phone app. It's a little insulting that Google's telling me to restart my phone. It's not my phone, it's the app.