If you don't like to receive anonymous calls, you can block them directly over the menu of your Huawei device. This will block all unknown numbers.

Android 10 | EMUI 10.0
Block unknown numbers -  Open the  Phone app
Block unknown numbers -  Open the  menu
Block unknown numbers -  Tap on  Blocked
Block unknown numbers -  Tap on  Call block rules
Block unknown numbers -  Tap on  Block private/withheld numbers
  1. Open the Phone app
  2. Open the menu
  3. Tap on Blocked
  4. Tap on Call block rules
  5. Tap on Block private/withheld numbers

Huawei Instructions
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