Cellular on Apple Watch stopped working
I have a Series 4 Apple Watch with SIM card paired with iPhone 6s with no SIM card. Service has been with AT&T - paying monthly charge for the Apple Watch. This configuration is for my father. This configuration has worked and even called 911 2x on his behalf. The Apple Watch Settings now shows, "No SIM" - the Apple Watch app Cellular Setup on the iPhone is grayed out and not accessible. AT&T says we need to pay for a cellular service for my fathers iPhone for his watch to work? Has something changed - version support?
Apple Watch Series 4