How to block calls iphone 8

- How to block calls on iphone 8 plus
- How to block spam calls on iphone 8
- How to block spam calls on iphone 8 plus
- How to block incoming calls on iphone 8
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- How to block unknown calls on iphone 8 plus
- How to block phone calls on iphone 8
- How to block unwanted calls on iphone 8 plus