Why can't I recieve incoming calls on my LG G4 phone??

[AC Question]

I own a LG G4 mobile phone. When someone phones me, a message pops up telling me: "Unfortunately, phone stopped". How can I get this to disappear from my screen. (I can phone anybody but they can't phone me)

 

[dpham00]

Try to restart the phone. Also try to clear cache and app data on the phone app. You can also try to do a factory data reset