Why won't my Iphone work. Apps, calls, texts, etc.
I can't use any of the apps on the phone. Unable to turn off phone also.
iPhone XR, iOS 14
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try a force restart
Force restart iPhone - Apple Support
also shown here
If your iPhone, iPad, or iPod touch won't turn on or is frozen - Apple Support
If iOS is performing poorly, see this article
About iOS performance on your iPhone, iPad, or iPod touch - Apple Support