Reply To: Cannot Make calls after iOS 11 Upgrade, White Screen

[Katy]

Resetting all the settings fixed it for me: Settings->General->Reset (at the bottom)->Reset All Settings. Not that many settings get reset actually, just like passwords mostly. But do it at your own risk.

Also I was having issues with the “large text” accessibility option. After I did the above, it started working, then stopped again, then I turned the large text off and it’s fine now.