After Update S21ultra jumps from 4g to 2g and back again after every 10 15 mins

[Sandipbjp]

After Update my S21 ultra is become very slow and even hangs too often apps keep crashing and the most irritating thing is that it jumps from 4g to 2g and back again every 10 15 mins 

[IndiaBetaTeam]

Dear Samsung Member,

Greetings from India Beta Team!

We acknowledge your feedback.
However, we request you to please report this feedback on the Error section, along with the logs. This would help us analyze your issue in a better way.

The path to report error is as below:
Open Samsung Members -> Click on beta banner -> Switch to beta mode-> Beta feedback -> Send feedback -> Error report

In the meanwhile, 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... 

Thank you for being our valued customer.

Warm Regards,
India Beta Team

[Bhanu958]

I am using Galaxy S21 Ultra software update not recognize