15 October 2021 I have software updates in samsung galaxy A51

[vishal_kr]

Many issues there in A51 after software update like sound problem, automatically switch off and on , very hang the phone and also stuck phone 

[prouser3108]

Reset the settings

[Samsung_Support2]

Dear Samsung Member,
 
Greetings from Samsung Customer Support!
  
We acknowledge your query and apologize for the same. To resolve your device slowing down issue please visit this link: https://www.samsung.com/in/support/mobile-devices/why-is-my-phone-slowing-down-and-how-can-i-speed-i...

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 Samsung.

Warm Regards,
Samsung Customer Support