If you are being bothered by unknown callers, you can set your iPhone to Allow Calls only from your known Contacts by using two different methods.
The first method is to switch on Silence Unknown callers feature as available in iPhone and this will automatically silence unknown callers and allow calls only from those that are listed on your Contact’s List.
While this method can block most unknown callers, it can be easily bypassed by anyone that calls your device with a hidden Caller ID.
In such cases, the most effective way to block unknown callers is to configure the Do Not Disturb mode to allow calls only from those that are listed in your Contacts list.
1. Enable ‘Silence Unknown Callers’ feature on iPhone
As mentioned above, the easiest way to Allow only known Contacts to call you is to enable ‘Silence Unknown Callers’ feature on your iPhone.
1. Go to Settings > Phone > Silence Unknown Callers.
2. On the next screen, move the toggle next to Silence Unknown Callers to ON position.
After this, your iPhone will only allow calls from known Contacts that are listed in your Contacts list.
2. Allow Calls from Known Contacts on iPhone
The easiest way to Allow Calls only from known Contacts on iPhone is to configure the Do Not Disturb Mode on iPhone to allow Calls only from Contacts or only from your Favorite Contacts.
1. Open Settings > tap on Focus > select Do Not Disturb.
2. On Do Not Disturb screen, tap on the People Tab.
3. On the next screen, tap on Allow Calls From and select Contacts Only option in the pop-up that appears
After this, your iPhone (In Do Not Disturb mode) will only allow Calls from people who are listed in your Contacts List. All other Calls from unknown Callers or Callers who may not know will be silenced and diverted to the Voicemail.
If you have numerous Contacts, select the Favorites option and this will allow calls only from those people that are marked as favorites in the Contacts App.
While this method is very effective in avoiding unwanted calls, it can potentially make you miss valid Calls from people who may not yet be on your Contacts List.