Cannot connect to cellular network after updating

Strange how immediately after I updated my phone it stopped working…I went to the Genius Bar and the person helping me said I would need to get a new phone and that Apple has been having these kinds of connection issues with iPhone 7s. Really, Apple?! You couldn’t even try to be less obvious?! It’s blatant these updates (which btw I was forced to do after ignoring it for a while) are just ploys to make customers get their newest models. Just let me keep my iPhone 7! Anyone else agree?!