How to set up call rejection for vivo mobile phone

If you need to reject all incoming calls, you can go to I Housekeeper (Utility)-Harassment Interception-Telephone Interception, turn on the switches for intercepting incoming calls with unknown numbers, intercepting incoming calls with unknown/empty numbers and intercepting overseas calls, and then click "+"-Select All-Add at the bottom to intercept.

Note: A few numbers may not be blocked.