AT&T Galaxy Note 5 will be receiving the Android 6.0 Marshmallow update a while after Google officially announces the update, and Samsung submits the update for Note 5 to AT&T.
This seem straightforward and quick when said, but actually this process goes pretty slow with AT&T. So don’t expect AT&T Note 5 Marshmallow update anytime before mid-November 2015, even it’s officially going to be released by Google on September 29th.
Android Marshmallow will be bringing loads of new features, but there won’t be a UI refresh like on Lollipop with material design. So we expect the update rollout slightly quicker than last year when Lollipop released and Samsung had to completely re-skin TouchWiz to match with the material design style.
From Samsung’s part, Android 6.0 Marshmallow update should be ready for AT&T Note 5 by November 2015. However, AT&T might delay it for another 15-30 days.
Expected release: Nov-Dec 2015