Re: HTC Notes disappeared after Lollipop update (HTC One M7)
Welcome to Android Central! Do you still have a shortcut icon for Notes on the homescreen? Does it still show up in the App Drawer?
There are times when a preinstalled app from the manufacturer is removed with a system update, but usually the icon disappears from the App Drawer. One notable exception is Google Currents, which turned into Google Play Newsstand. On the Nexus 7, Google Currents was preinstalled--but a subsequent update to the Currents app just made it an empty shell of an app that would only encourage you to use Google Play Newsstand. There was no way to remove this empty Currents app, because it was still a preinstalled app. Didn't make much sense.