How to activate the “blocking” function? Gogolook Service September 10, 2020 07:26 Please follow the steps to set up: Enter Whoscall -> Tap "Blocking" Tap the green + button beside "Block by number" and enter the number you want to block. Related articles How to activate the "Caller Identification" function? Can Whoscall block Unknown numbers? Can Whoscall block the phone call starting with certain numbers? I activated the "Caller Identification" function, but why are there still some numbers unknown? What features does Whoscall Premium offer? Comments 0 comments Article is closed for comments.