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The Oppo-Smartphone offers the possibility to reject unknown callers automatically, meaning that if the phone number is not saved as a contact, the call is automatically rejected.

The function also offers as an exception, if the same caller within 3 minutes again, it is not blocked.

Android 11 | ColorOS 11.0 | Google Phone
Step 1: Tap on  Phone
Step 2: Open the  Menu
Step 3: Tap on  Settings
Step 4: Tap on  Blocked numbers
Step 5: Enable or disable  Unknown
  1. Tap on Phone
  2. Open the Menu
  3. Tap on Settings
  4. Tap on Blocked numbers
  5. Enable or disable Unknown
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Oppo Instructions
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