National Anti-Fraud Center Call Warning

How to activate the National Anti-Fraud Center call warning: 1. Open the mobile phone desktop and click "Settings", slide up the interface, and then click "Phone"; 2. Click "Call Blocking and Identification", and then click the National Anti-Fraud Center button to successfully activate; 3. Re-open the mobile phone desktop and click "National Anti-Fraud Center", then click "Incoming Call Alert"; 4. Click "Turn On Now", and then the system prompts "Incoming Call Alert Guarding", proving that the incoming call alert function is successfully turned on.