S21 ultra restarting randomly

[Blackfyre]

Anyone else having the same issue? Mine is new n it has done it 4 times already. 4th time it froze n restarted. There are also lags n stutters while unlocking n switching between apps is it some ui issue that can be fixed in future bugs? 

Any insight will be highly appreciated. I'm quite worried I love this phone I don't want it to have any problems 😔

[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/