How to turn off a Samsung phone without the power button
Is it possible to turn off the phone even though the power button is broken? The answer is yes, on the Note 10, Galaxy S20, Galaxy Z Flip and galaxy a series phones, the Power and Bixby keys have been replaced by the side key.
And with this new setting, there are other ways to turn off your phone, such as using two side keys simultaneously or tapping the power button in the quick settings panel, and these options can be used to turn off your phone if it doesn’t have a dedicated power key.
Quickly pressing the side switch puts the screen to sleep. However, if you press and hold the side key, Bixby Voice will be activated.
While in case if you want to completely turn off your phone using the keys, press and hold the Side and Volume Down keys simultaneously for a few seconds, and when the Power menu appears, tap on Power off.
How to turn off a Samsung phone without the power button
On the Note 10, Galaxy S20, Galaxy Z Flip, and galaxy a series phones, a power icon has been added to the quick settings panel. And to turn off the power through the quick settings.
Swipe down from the top of the screen, tap the Power icon at the top right of the screen (next to the Settings icon), then tap Power off.

Turn off Bixby
Bixby can also help you turn off your phone. You just need to set up Bixby Voice, which gives you a quick and easy process. After setting up Bixby Voice, press and hold the side key, then say “turn off phone.”
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Now, what do you think about this feature provided by the phones of the Korean company Samsung?