Turn on Do Not Disturb
Enable Focus mode
Set calls to silence from unknown numbers
Block specific contacts
Forward calls to voicemail
Turn on call barring if your carrier supports it
Disable the phone app’s call notifications
Use a call-blocking app
Turn off cellular service temporarily
Remove or disable the SIM card
Put the phone in Silent mode and reject calls manually
Set up a custom ringtone for all contacts to silent
Ask your carrier to suspend incoming calls
Use Wi-Fi calling settings to limit call reception
Power off the phone