How to add a blacklist by adding 7T
Step 1: click the dial button on the mobile phone desktop,
Step 2: switch to 'contact' after entering the dialing interface,
Step 3: find the contact to be added to the blacklist, click to enter the contact interface, and then click the three dot marks in the upper right corner,
Step 4: then select in the pop-up box and click 'add to blacklist'.