Software is far from perfect, and a malfunctioning program may be the reason your Samsung Galaxy isn't turning off. If you can't use the power button or the touch screen controls to power off your phone, you can try a forced restart.
This may sound a little aggressive, but a force restart is perfectly safe, so long as it isn't overused. Simply hold down thepower buttonandvolume down buttonfor around ten seconds. When the screen goes black, you're free to let go, and your Galaxy will automatically restart itself.
In the window between the screen going black and the phone restarting, you have the opportunity to boot in either recovery mode or download mode. For recovery mode, holdvolume upand theBixby button, and for download mode holdvolume downand theBixby button.
Charge Your Samsung Galaxy
If your Galaxy won't turn off and you can't restart it, try plugging it into the charger. If it doesn't have enough juice left to turn itself back on, a forced restart won't work. Just plug it in for an hour or two to make sure your Samsung Galaxy has all the power it needs.
Factory Reset
It could be that the issue is more deeply rooted than a glitchy app. You may have downloaded some corrupted data in an update or installed a similarly bug-ridden piece of software. In this case, your best bet is a factory reset.
Before reseting your Samsung Galaxy, make sure to save a backup of your information. When the reset is complete, you'll be able to restore from your backup. That way, you won't lose things like your photos and contacts
