C1580029684583 , via OnePlus 7T , May 24, 2021 : How to block calls from all unknown numbers in my one plus 7t phone?
Aaron2017 , May 24, 2021 : With OnePlus dailer you have to do it one by one whenever you have gotten a call from an unknown number, if i'm not mistaken. If you download and use the Google contacts app, that has a setting for blocking all calls from unknown numbers.
Bittoo06 , May 24, 2021 : All unknown numbers? Are you sure? Then even your courier person won't be able to call you. Make sure while you do so.
