How can I check my WiFi signal strength on iPhone?

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Tags

1. #number
2. #screen
3. #indicator
4. #upper
5. #12345
6. #toggle
7. #strength
8. #simply
9. #iphone
10. #corner
11. #taping
12. #field
13. #enter
14. #press
15. #notice
16. #between
17. #signal