Re: how to sign in and out of email on Galaxy Note 3 Phone
Welcome to Android Central! For most email apps (like the stock Email app and the Gmail app), there is no way to quickly log out and log back in. You'd have to actually remove the account. I think you can log out with the Yahoo Mail app, but logging back in can take several seconds as the app resyncs all of the data. In general, you should have a good screenlock for your phone, rather than try to log out of your accounts.