If you want to run your app on a real Android device, you must enable ‘USB Debugging’. You can find the option under
‘Settings > Developer Options’.
On Android 4.2 and newer, Developer options is hidden by default. To make it available, go to
‘Settings > About Phone’
and tap ‘Build Number’ seven times. Return to the previous screen to find ‘Developer Options’ then enable ‘USB Debugging’.
