How to turn off Samsung S21 Ultra without screen

Last Update date : Jul 25. 2022

On the Note10, S20, Z Flip, and A series phones, the Power and Bixby keys have been replaced with the Side key. With this new setup, there are other ways to power off your phone, like using two side keys at once or tapping the Power icon located in the Quick settings panel. Use these options to shut off your phone if it doesn't have a dedicated Power key.

Power off with keys

On the Note10, S20, Z Flip, and A series phones, quickly pressing the Side key will put the screen to sleep. However, if you press and hold the Side key, Bixby Voice will activate.

If you want to fully power off your phone using the keys, press and hold the Side and Volume down keys simultaneously for a few seconds. When the Power menu appears, tap Power off.

Power off using the Quick settings panel

On the Note10, S20, Z Flip, and A series phones, a Power icon has been added to the Quick settings panel.

To power off through Quick settings, swipe down from the top of the screen. Tap the Power icon in the upper right of the screen (next to the Settings icon), and then tap Power off.

Power off with Bixby

Bixby can also help you turn off your phone. You just need to set up Bixby Voice. It's a quick and easy process. After Bixby Voice has been set up, press and hold the Side key, and then say "Turn off the phone."

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This time around, Samsung didn't move the goalposts and keys when it comes to switching off, restarting, or resetting the Galaxy S21, S21+, or S21 Ultra, as it did not long ago, and left the restart sequence as it is on the Note 20 series.

The keys are still on the right-hand side of the S21 series but if you just got the phone and are wondering what key combo turns the S21 off or restarts it, here's the scoop.

How do I turn on/off or restart my Samsung Galaxy S21?

Turn on the Galaxy S21

  • Press and hold the power side key to switch on your Galaxy S21

Turn off or restart the Galaxy S21

  1. Press the volume down and power keys at once.
  2. Hold them until the switch-off/restart/emergency mode virtual buttons menu appears.
  3. Tap on the big red Power off icon at the top, or the green Restart button in the middle.
  4.  Go to Advanced features > Side key > How to power off your phone for more options.

Ditto for switching on/off, or restarting your Samsung Galaxy S21 Ultra or Galaxy S21+. Alternatively, you can go to Advanced features > Side key > How to power off your phone, and set the long-press of the side key to show up the restart menu, instead of calling up Bixby.

Hard reset the Galaxy S21

  • Press and hold the volume down and power keys for more than 10 seconds

Reset Galaxy S21 to factory default settings

  • Settings > General management > Reset > Reset all settings

If you need to restore your Galaxy S21 Ultra, this feature resets it to factory default settings, save for the security, language, and accounts, while leaving personal data intact.

How do I turn off my Samsung S21 without the screen?

If you want to fully power off your phone using the keys, press and hold the Side and Volume down keys simultaneously for a few seconds.

How do I force shutdown my Samsung S21 Ultra?

If your device is frozen and unresponsive, press and hold the Power button and the Volume down button down simultaneously for more than 7 seconds to restart it.

How can I turn off Samsung Galaxy S21 ultra without power button?

To power off through Quick settings, swipe down from the top of the screen. Tap the Power icon in the upper right of the screen (next to the Settings icon), and then tap Power off.