Final answer:
To block unknown callers on an iPhone, go to Settings > Phone and toggle on 'Silence Unknown Callers'. This feature prevents calls from numbers not in your contacts, recent calls, or with previous text interaction from ringing through.
Step-by-step explanation:
Blocking Unknown Callers on iPhone
To block unknown callers on an iPhone, you may utilize the built-in feature that silences unknown callers. Here's how you can enable this feature:
- Open the Settings app on your iPhone.
- Scroll down and tap on the Phone option.
- Look for the Silence Unknown Callers feature and toggle it on.
Once this feature is enabled, calls from unknown numbers that are not in your contacts list, nor in your recent outgoing calls or have been previously texted by you, will be silenced, sent to voicemail, and listed in the 'Recents' section of the Phone app, ensuring your phone does not ring with unwanted calls.