The button to connect to wifi won’t work. Tried powering off but didn’t help

If your iPhone, iPad, or iPod touch won't connect to a Wi-Fi network - Apple Support

Isshy Said:

"The button to connect to wifi won’t work. Tried powering off but didn’t help: How to fix the wifi connection on iPhone 6. It doesn’t work."

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Troubleshooting iPhone WiFi:

Try these Thoughts:

A. Clear Temporary Internet Files:

If connecting is unsuccessful, try clearing out your Temporary Internet Files: History, Cache, and Cookies

Go Here: Clear your Safari Browser History and Set Up Content Blockers on your iPhone, iPad, or iPod touch - Apple Support

and...

B. Try manually restarting your iPhone:

1. Go To: Settings
2. Select: General
3. Scroll to: the Very Bottom
4. Select: Shut Down
5. Slide Finger: to the Right
6. Wait: 30 Seconds
7. Power One: the iPhone
8. Try this Once More

and...

C. Troubleshooting Connectivity:

Wi-Fi: If your iPhone won’t Connect to a Wi-Fi Network - Apple Support