The iPhone 8 reboot is not the same as the old iPhone, so the reboot is also different.
On iPhone 7 and iPhone 7 Plus, to restart the device, users need to press and hold the power button and volume down button simultaneously for about 10 seconds. The restart process starts when the apple logo appears.
On the new iPhone duo, users need to do a somewhat more complicated operation. First, press and quickly release the volume up button, then press and quickly release the volume down button and press and hold the power button until the apple logo appears.
This is still the way to apply for iPhone 8 and iPhone 8 Plus, is not clear will apply to iPhone X or not.
Meanwhile, users still turn off the phone in the old way, that is pressing the power button until “slide to power” appears and slide horizontally to turn it off. On iOS 11, Apple also added a shutdown option in the Settings section.