Restarting and shutting sometimes for no reason

[XTWXTOMEHAWK]

My phone have been restarting and shutting down without any reason, while not using like if I do not use my phone for less than 1 min it's restart and shut down. This started after the update.

No third party application installed 

Still restart in safe mode 

Auto optimisation is off 

[BandOfBrothers]

This obviously shouldn't be happening @XTWXTOMEHAWK 

Can I ask you to please try the following >

• Safe Mode  > https://www.samsung.com/uk/support/mobile-devices/how-to-start-my-galaxy-device-in-safe-mode/ turns off downloaded apps and themes etc which may highlight an app or theme that's causing conflict. 
• Clear Cache Files from the phone's System Partition Section  > https://www.samsung.com/uk/support/mobile-devices/how-do-i-clear-the-cache-on-my-device/ You may need to insert your earphones or hook upto a powered On Laptop to access the Clear Partition Section. This may help with lag or stutters as this clears the phone of old/unused or broken cache files.There is also a Repair Apps option in the Menu System too. 
• Run the diagnostic test tool in your Samsung Members app.
• A last resort would be a back up and Factory Reset.

If I can be of any further help then please don't hesitate. Take care.  😎 

Merry Christmas. 🎅 

[XTWXTOMEHAWK]

Hello
I tried Factory reset, safe mode(still restated) and I have 90GB left of the space.

[unitedlaptop]

applications. You can think of it as a diagnostic tool to help identify and fix problems on your device.

Enter Safe modeClick to collapse

There are two ways to start your device in Safe mode. You can either reboot your device or power on your device in Safe mode.

Reboot device in Safe mode:

1Press and hold the Power key until the "Power off" screen is displayed.

Please note: If your device does not have a separate Power key, use the key combination that you would usually use to switch off your device. The below image shows the key combination on the Galaxy Note10.



2Tap and hold the "Power Off" icon until the “Safe mode” option is displayed.



3Tap “Safe mode”.



4Your device will restart to show the home screen in Safe mode.



Power on your device in Safe mode:

1Power off your device.

2Power on your device.

3When the Samsung logo appears by itself, press and hold the Volume down key.

4The device will switch on in Safe mode. "Safe mode" will be displayed on the bottom left of the screen.

[unitedlaptop]

Do it