Wifi not connecting

Since we don't know what constitutes "tried everything," see if the following support article can help:

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

If you have already tried everything in that article, and they, didn't help, the next step is to contact Apple Support directly. To do so, simply select the "Get Support" link in the upper right-hand side of this forum's web page.

Any errors?

What iOS version is it running?

Any WiFi location like home, friends, public places?

Restarted?

Reset Network Settings?