Anonymous calls cannot be blocked because the Xiaomi smartphone cannot assign the caller ID or identifier. However, there is a remedy for this, as the device can automatically block all unknown calls, rejecting the caller and not establish a connection.

Android 10 (MIUI 12.0)
Step 1:  Open the  Phone app
Step 2:  Open the  Settings
Step 3:  Tap on  Blocklist
Step 4:  Tap on  Call blocklist
Step 5:  Enable or disable  Block calls from hidden numbers
  1. Open the Phone app
  2. Open the Settings
  3. Tap on Blocklist
  4. Tap on Call blocklist
  5. Enable or disable Block calls from hidden numbers

Xiaomi Instructions
Loading...

Transmitting...