Press and hold the Power button and the Volume Down button at the same time
Keep holding until the Samsung logo appears
Release both buttons
Wait for the phone to restart
If the phone is unresponsive, press and hold the Power button for about 10–20 seconds until it restarts
To restart from settings: open Settings
Tap Battery and device care
Tap Restart
Tap Restart again to confirm
For phones with a physical Home button: press and hold the Power button until the Power off menu appears
Tap Restart (or Power off, then Power on)