During the use of iPhone 17, in rare cases, you may encounter minor software malfunctions such as unresponsive applications, frozen screens, touch failures, or inability to shut down. The most direct and effective solution at this point is to force a restart.
Standard forced restart operation
When your iPhone 17 experiences software freezing but the screen still displays (such as stuck in an application interface), please strictly follow the following order and speed:
1. Quickly press and release the ‘volume up button’
2. Quickly press and release the ‘volume down button’
3. Immediately press and hold the “power button” on the side (also known as the side button)
Press and hold continuously, even if you see the shutdown slider appear, do not release it until the Apple logo appears on the screen, then release the power button.
The phone will automatically complete the restart process, which usually takes one or two minutes to wait.

force restart
By following the above simple steps to perform a forced restart, various iOS issues such as system crashes or freezes can generally be resolved.