Facing network issue in iphone 8 after ios14.1

I have updated iphone 8 to 14.1 iOS, afterwards facing network issue.
Network is dropping too frequently.

Unable to use data or calling functionality.

Tried all the solutions mentioned on the internet but no luck.

please let me know when it can be fix.


Facing network issue in iphone 8 after ios14.1
 
 
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