After updating and after some days mobile A51 will restart automatically.

[libra786]

My mobile restart automatically. Even sometimes continues restarting. Can't use it. I m upset to use Samsung after this update.

[Samsung_specialist]

Hi, 

For assistance, please visit one of our authorized Service Centers to check it for you. You may refer to the link it will guide you to the nearest service center to your location https://www.samsung.com/ae/support/service-center/

[Mihran]

U can just boot once it in a safe boot

[Mihran]

And try using it again