There are many reasons why to block a number. Before, you had to call your provider and provide the number of the caller you wanted to block. Now, all you have to do is simply bock them in the contacts list.

Android 9
Step 1:  Open  Contacts
Step 2:  Choose a  Contact
Step 3:  Open the  menu
Step 4:  Tap on  Block numbers
Step 5:  Confirm with  Block
  1. Open Contacts
  2. Choose a Contact
  3. Open the menu
  4. Tap on Block numbers
  5. Confirm with Block

Android Instructions
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