Why doesn't the tablet answer my phone?

Although I don't understand what it means, I will answer you literally:

Method 1: If your tablet doesn't have a mobile phone card, you don't have to answer the phone.

Method 2: If your tablet has a mobile phone card inserted, drag your mobile phone number into the blacklist;

Method 3: If your tablet is plugged with a mobile phone card, set it to flight mode;

Method 4: always stare at the mobile phone and don't dial the number of the tablet.