Ringer stuck on off
The ringer on my iPhone SE (2nd gen) is stuck on off and all related settings are set to on.
Question marked as
Some things to check (if you haven't already):
The ring/silent switch on the left side of the phone. See: https://support.apple.com/en-us/HT208353
Settings > Phone > Silence Unknown Callers: https://support.apple.com/en-us/HT207099
Do Not Disturb: https://support.apple.com/en-us/HT204321
If none of the above, also try restarting: https://support.apple.com/en-us/HT201559