phone not ringing
all of a sudden my phone does not make a ringing sound or any other sound
iPhone XS, iOS 13
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Some things to check (although they don't apply if the phone won't make any sound from any app, won't play music, etc):
The ring/silent switch on the left side of the phone. See: How to put your iPhone on vibrate, ring, or silent mode - Apple Support
Settings > Phone > Silence Unknown Callers: Detect and block spam phone calls - Apple Support
Do Not Disturb: Use Do Not Disturb on your iPhone, iPad, and iPod touch - Apple Support