Are you receiving a lot of calls from Unknown Caller that you don't recognize? Don't panic, because it is very simple to block calls from unknown numbers using the Phone app on Android phones. In this forum I'll teach you how to block calls from unknown callers on your Android phone.
1. First of all, Open the Phone app
2. Tap the Three dot icon in the upper right corner of your phone.
3. Then, Tap on "Settings" > Blocked Calls.
4. Now, toggle the Block unknown callers button to the green position
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