How to set up call blocking (call rejections) on my Sony Xperia XZ1

Click each step to see the action. You can also click the picture or use the arrow keys.

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With call blocking, you can automatically reject incoming calls from specific phone numbers. Blocked callers will hear an announcement that your number isn't accepting calls. Other calls will ring through as usual.
1. Touch Apps.
2. Touch Phone.
3. Touch the Menu icon.
4. Touch Settings.
5. Touch Block numbers.
6. To add a phone number to the block list: touch ADD A NUMBER.
7. Enter the desired phone number.
8. Touch BLOCK.
9. The phone number has been added.
10. To remove a phone number from the block list: touch the X icon next to the phone number.
11. Touch UNBLOCK.
12. The phone number has been removed.