Can Whoscall block SMS? Whoscall Service Center September 10, 2020 07:24 Currently, Whoscall is unable to block SMS due to the restriction of the iOS system. Related articles Does Whoscall automatically block unknown numbers? Can Whoscall block the phone call starting with certain numbers? How can I block SMS? How to activate the "Caller Identification" function? Why is “Call Blocking & Identification” turned off? Why can’t I find it? Comments 0 comments Article is closed for comments.