Why can't I get text messages and phone calls from blacklisted mobile phone numbers? There is no record in the blacklist.

Add the blacklisted mobile phone number, and you can't receive text messages and phone calls from the blacklisted number. There is no record in the blacklist. According to your description, it's normal, because after entering the Settings-Security-Harassment Interception-Blacklist, you won't receive calls and text messages from this number, and there will be no relevant records. As shown in the figure below: