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? How can I block SMS? Can Whoscall block the phone call starting with certain numbers? Why is “Call Blocking & Identification” turned off? Why can’t I find it? What features does the Whoscall Premium version have? Comments 0 comments Article is closed for comments.