Hey there, and welcome to Apple Support Communities A7768,
We can certainly understand your concern and can help provide some insight.
We recommend checking out these steps for more information on what to do if you are not receiving phone calls.
" Update your software
- Check for a carrier settings update.
- Check for an iOS software update. Some updates might require a Wi-Fi connection.
Check your iPhone settings
- Turn Airplane Mode on and off. Go to Settings and turn on Airplane Mode, wait five seconds, then turn it off.
- Check Do Not Disturb. Go to Settings > Focus > Do Not Disturb and make sure it's off.
- Check for any blocked phone numbers. Go to Settings > Phone > Blocked Contacts.
- See if Call Forwarding is turned on. Go to Settings > Phone > Call Forwarding and make sure it's off.
- Check to see if Silence Unknown Callers is turned on. If the setting is on, a caller must be listed in your Contacts or Recents. Or they must have shared their number in Mail or sent you a message using that number in order for their call to go through. Add their number to Contacts to ensure the phone rings. Calls from some third-party apps might not go through.
Check your network settings
- Reset your network settings. Go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. This will erase all current saved settings, including Wi-Fi passwords, preferred networks, and VPN settings.
- Try to make or receive calls in another location.
Contact Apple Support
If you still can't make or receive calls, contact Apple Support, then follow the steps to complete your request. "
For additional information, check out this link: If you can't make or receive calls on your iPhone - Apple Support
These steps will help ensure your device is working with ease and can fix common issues like the ones you’re experiencing.
Kindest regards!