Cellular update failed
I updated my iPhone 7 to IOS 14.6 but I received the error saying ‘No Service’ message at the iPhone screen’s upper right corner and prompted message 'your iPhone cannot make and receive calls or access cellular data until it has been updated'. I tried every method to solve this problem but those ways have not worked. I found this problem in the support apple page:
https://support.apple.com/iphone-7-no-service/other-countries
But when I referred to Apple Authorized Service Provider, they said that m device has been retailed for more than 4 years and it costs me more than a new brand iPhone 7 to fix it that is complete nonsense. This problem was prompted because of the Apple bug and they should take responsibility for their own problem. My device was working without any problem and this problem is only due to a component that has failed on the main logic board.
iPhone 7, iOS 14