If your iPhone isn't responding, and you're not able to power it off and then on again, you can force restart it to hopefully fix the issue.  Forcing a restart is different from a normal restart.

While the Apple Watch has yet to fully replace the company's game-changing iPhone, the wrist-bound device has, arguably, become as integral to the lives of many of its users as its celebrated ...

A frozen phone is a common (and frustrating) phenomenon, but there are ways to bring your device back to life. If your iPhone isn't responding, and you're not able to power it off and then on again, ...