No cell service after update

This is true! iPhone 7s do have this glitch. I had it myself. To fix it you need to take it into the apple store with a Genius Bar appointment they will fix it for free and they also replace the battery and front camera also for free. It takes a week but you resave a loner phone.

See Here: https://support.apple.com/iphone-7-no-service

See here: https://support.apple.com/iphone-7-no-service

~Lyssa

Of course!