There are many reasons why you may need to turn off your iPhone, but the process depends on which one you own. To turn off any iPhone.
You may want to leave your phone turned on all day, but sometimes a full reboot is required. There are many reasons why your phone may stop responding ̵
1; it may be slow or frozen – but if you know how to restart your phone, you can solve a number of problems from an iPhone. If the screen goes dark, that does not mean that the phone is off. It sleeps, protects the battery and is (hopefully) locked for your safety.
Turning off a phone may sound simple and self-explanatory, but depending on the iPhone model and version, there are different ways iOS works. To turn off an iPhone.