You can always reset by tapping the home button or swiping the most recent app away or so, so you can try various UI layouts until one works. Most Androids have

You can always reset by tapping the home button or swiping the most recent app away or so, so you can try various UI layouts until one works. Most Androids have a settings button in the notification area and then you can find the installed apps, search for the dialer, etc. Don't need to assume a certain homescreen location.