It was reported last week that Samsung was testing out the Android 5.0 Lollipop update on the Galaxy S4, last year’s flagship smartphone. Previews of the update running on the current flagship, Galaxy S5, have already been leaked online but this is a first. Today we get a look at the preview of a leaked Galaxy S4 Android 5.0 build which not only features Lollipop but also new TouchWiz user interface from Samsung.