Why can't I answer my phone when it rings

[AC Question]

When my phone rings I get a black screen or it stays on my home screen and I can't answer it

 

[Denny P2]

Have you tried to do a hard reset on the phone?

 

[AlphaTango414]

Wipe system cache via recovery mode. Wipe Dialer app cache via application manager.

You may also want to skim over your settings in accessibility.

 

[Lisa Arnold1]

When my phone ring i cant answer. When i push the green tone it wont answer why please help me

 

[belodion]

When my phone ring i cant answer. When i push the green tone it wont answer why please help me

Have you tried swiping rather than pushing?