Run the app and sign in with your Microsoft account.
Check for updates (Settings > Phone update > Check for updates) and download/install any that are available. YouÃ¢â‚¬â„¢ll have an update to download and install before Windows Phone 8.1 shows up if youÃ¢â‚¬â„¢re downloading the Preview for Developers program for the first time.
ThatÃ¢â‚¬â„¢s it. You now have Windows Phone 8.1 on your device.[signoff predefined=”Enjoy this?” icon=”icon-users”][/signoff]