I just used 2GB of Cellular Data in 6 days. I haven't left my house because of Coronavirus stay at home orders and I am on WiFi the entire time. My Wi-Fi Assist is off (I never use this). How is it possible I have used all of this data? I've never had this problem before.
We know how important it is to have a phone that performs the way you need it to, twbryan2. If you go to Settings and tap Cellular, do you see a breakdown of which apps are using data? This list may show a cumulative total amount if it has never been configured, but it may also show the data usage over the billing cycle.