Samsung s21 ultra Auto switch off

[Anu777]

Hello all,

I am facing this issue since last 3 days. My phone goes completely black and becomes totally unresponsive for quite some time. It turns on after some time and again auto switches off. This is repeatedly happening from the last 3 days. Please let me know if any of you also experiencing the same and how to resolve this.

Thanks.

[iamrohitkm]

Is it happening after any updates? Or else may be battery is gone you need to replace it.

[Anu777]

Yes

[Anu777]

Battery is perfectly fine

[iamrohitkm]

Go to service centre and get it checked thru their tools then you will come to know.

[cs_member10]

Dear Samsung member,

Greetings from Samsung customer support.

As per your query, kindly follow the easy troubleshooting steps which might help to solve the issue.

Kindly use genuine Samsung charger.
Note: We always recommend to use genuine Samsung charger for charging your device.

Disable auto restart function
There are two methods to disable auto restart function
Method 1: Navigate to apps screen and tap on Settings>>Tap on General management>>Tap on Reset>>Disable Auto restart (if enabled)>>Auto restart disabled.
Method 2: Go to "Settings">>Tap on "Battery and device care">> Tap on Three dots>> Tap on "Automation">>Disable "Auto restart at set times" if enabled

Check the device in safe mode: https://www.samsung.com/in/support/mobile-devices/safe-mode-on-samsung-phones/

If you are facing this issue after installing any new application, then uninstall that application.
Please follow the steps: Navigate to apps screen and tap on Settings>>Tap on Apps>>Tap on desired app>>Tap on Uninstall>>Tap on OK.

Update device software (If Software update available): https://www.samsung.com/in/support/mobile-devices/samsung-galaxy-smartphone-how-to-update-software/

Reset the device: https://www.samsung.com/in/support/mobile-devices/samsung-galaxy-mobile-how-to-perform-a-factory-res...

In case the issue still occurs. Please visit the service center for a physical inspection of your device. You can locate your nearest service center with this given link: https://www.samsung.com/in/support/service-center/

Warm Regards,
Samsung Customer Support.