Today at Hungary one of the Samsung Galaxy Note 4 users receives Android 6.0 update on his device (SM-N910F). This was an unexpected update that rolled out without any prior notice. We think that Hungary is in the frontline of getting Android 6.0 update first. Earlier they received 6.0 update for LG G4 model and now for Galaxy Note 4.
According to the Google report only 3-4% of Android Smartphone is equipped with the Android 6.0 and by 2016 all the 2nd Generation smartphones might get this update