Reply to iOS 14 no signal, no cellular data Feb 4, 2021 - same issue. I just updated two phones (7 and SE) to 14.4 now can't get any data connectivity (using Visible on Verizon LTE). Put the sim into an iPhone 6 running iOS 12.4.9 and have no issues with data connectivity. Argh. App & System Services Core OS Feb ’21