W10: How do I block hidden numbers? Updated November 17, 2017 17:08 Follow In the block section in the app, tap on 'Block settings’, and make sure the 'Block Hidden Numbers' toggle is checked. Related articles W10: How do I enable Call Blocking? What is a hidden number? W10: How do I block top spammers in my area? W10 Preview: How do I enable Caller ID? How to make Truecaller your default dialer Comments 0 comments Article is closed for comments.