Apple India — Cellular data issue on updating to IOS 17.0.2

My iPhone XR, has been in excellent condition ever since I purchased the product. Recently upon updating to iOS 17.0.2, it lost all cellular connectivity. It showed cellular issue detected, and that an update is required to fix the issue.
However, the handset would not update to iOS 17.0.3.
Apple customer care ran some diagnostics online and I was advised to approach a local Genius Bar further.
The iVenus apple Genius Bar reset my iPhone and now the iPhone cannot be activated!
Kindly resolve my problem!