Why won't the phone number display on the screen when receiving a call?

[iMore Question]

When receiving a call the number does not display on the screen, I have to tap a green bar on top to snow the caller. Why?

 

[SwitchBeach]

Re: phone display

What phone?

 

[Bigeric23]

Re: phone display

Have you tried restarting your device?

https://support.apple.com/en-us/HT201559