If you have an iPhone and it is in safe mode, you can start it by pressing and holding the power button and the home button at the same time for about 10 seconds. Then release them both and hold down the option key until your iPhone starts up in safe mode.
Hold down the Sleep/Wake button on the top of your iPhone until “slide to power off” appears. Slide to power off. Hold down the Sleep/Wake button until the Apple logo appears. Let go of the Sleep/Wake button and wait for your iPhone to start up.
iPhone 8 / iPhone X: how to Force Restart, enter recovery, and DFU mode
Check out How To Break An Iphone?
