Turn on Do Not Disturb or Focus mode and allow calls from no one
Enable Airplane Mode to block all cellular calls
Turn off cellular service by disabling the SIM or eSIM line
Contact your carrier and request full call barring on your line
Use your phone’s call blocking settings to block all unknown and private numbers
Set call forwarding to voicemail or another number if your carrier allows it
Install a call-blocking app and configure it to reject all incoming calls
Silence all calls by setting the ringtone to silent and enabling vibration off
Use a secondary device or number for only approved contacts
Ask your carrier to suspend incoming calls temporarily if available