I have a Iphone 7 and did the update to 14.8 and the phone dead. The upgrade bring me the massage that not service and the update cant continue per Network issue. I tried to uninstall and upgrade to 15 but its the same. Also tray with mane networks and its worst because my Itunes now don+t get the cell info so I can backup my info. I tried many thinks like restar the network settings but its the same issue. Nots works.... I hope that they bring a new release to fix that ASAP until i get a new phone to continue receiving calls... But apple says that Im lucky because its working with wi fi yet.. WTF....