https://www.theverge.com/2019/2/4/18211044/apple-att-5g-e-network-icon-iphones-misleading-ios-software-update-beta

There are no 5G iPhones, and there probably won’t be 5G iPhones for a while. But that isn’t stopping Apple and AT&T: they are reportedly rolling out AT&T’s fake “5G E” branding with its upcoming iOS 12.2 update, according to a report from MacRumors. Much like when the two companies pulled this scam with 4G and LTE back in 2012, if you can’t beat them, you roll out a software update to make it look like you did even though the phones and network are still exactly the same.