How do i reboot a galaxy s8?

[Android Central Question]

Phone not ringing for incoming calls. Need to reboot galaxy s8,

 

[methodman89]

Reboot means turning off then on. Press and hold power button until power off phone option. Afterward, press power button about 4 seconds to restart.

 

[B. Diddy]

Welcome to Android Central! First things first -- are you certain the ringer volume is turned up? The volume slider for the ringer is separate from the media and alarm volumes.