Samsung Galaxy S21 ultra randomly restarting

[I_Djoshi]

I have a samsung S21ultra and it's randomly restarting. I have reached out to samsung and I had also sent my phone to samsung to repair. But still not resolved. Now I am tired to call them for the same issue again and again

I am from more than a year now. I have already sent my phone to samsung almost 5 times to repair. But no luck/no good response from them, any suggestions? 

[TheFastestIndian]

Samsung CEO link to raise concern

https://contactus.samsung.com/customer/contactus/formmail/mail/MailQuestionGeneralNew.jsp?siteId=592...

[cs-member11]

Dear Samsung member,

Greetings from Samsung customer support.

Thank you for sharing your concern. We acknowledge your query and apologize for the same. And please follow the easy troubleshooting steps which might help to solve the issue.
Kindly use a genuine Samsung charger.

Note: We always recommend using a genuine Samsung charger for charging your device.
There are two methods to disable the auto-restart function
Method 1
Please follow the below steps:
Step1: Navigate to the app's screen and tap on Settings.
Step2: Tap on General management.
Step3: Tap on Reset.
Step4: Disable Auto restart (if enabled).
Step5: Auto-restart disabled.

Method 2
Please follow the below steps:
Step1: Go to "Settings"
Step2: Tap on "Battery and device care"
Step3: Tap on Three dots
Step4: Tap on "Automation"
Step5: Disable "Auto-restart at set times" if enabled

In case the issue still occurs. Please register your concern in Samsung Members Application (Open Samsung Members Application > Support> Tap on error report > Type your query > Send).

Thank you for writing to Samsung.
Warm regard,
Samsung customer support

[I_Djoshi]

I have tried everything, literally no help from Samsung at all.
Such a poor service. Yesterday I thought let's try to post in samsung members.

[I_Djoshi]

Now I am getting this error again and again, I mean this is an additional error.
When I reached out to samsung and Samsung executive said, there should be a third party apps which are making a cause.
But even after restart, no third party apps. But no solution at all.
Seems wasted my money on this and this is so frustrating 😤

[vinayshah]

Try safe mode, soft reset and hard reset in the order of mention. It should solve.