First we have seen an internal build of the Android 5.0 Lollipop known also as Android L on the Samsung Galaxy S5. Now Samsung have managed to get their hands on an internal Lollipop build for the older Galaxy S4, and have a video for us to see below.
In term of performance , the build was said to be much faster than the KitKat and at managing the memory .And in term of design it is same as for the Galaxy S5 . You have the new notifications that appear on the lockscreen and everywhere else in the UI. The stock apps have been updated with new Material Design UI elements. The multitasking menu also has the new card-style layout.
SamMobile haven’t released the build because it’s not exactly stable but you can watch check it out in the video above.