Automatically Restarting

It is happening in my f42 5g as well

You need to change mother board
Or buy a new mobile
And don't buy any Samsung phone

Dear Samsung member,

Greetings from Samsung customer support.

We acknowledge your query and apologize for the inconvenience caused to you and will surely assist you regarding the same and please follow the easy troubleshooting steps which might help to solve the issue.

There are two methods to disable the auto-restart function
Method 1: From the home screen swipe up or down to access the App Screen > Setting > General Management > Reset > Auto Restart > To Turn OFF auto-restart slide the slider toward the left.
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

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

Reset settings: From the home screen, click on Settings>>General Management>> click on reset and then reset setting.

In case the issue still occurs. Please register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).

Thank you for writing to us.
Warm Regards,
Samsung Customer Support.