AT&T subscribers will be happy to learn that their carrier is finally rolling out Marshmallow for the Galaxy Note 5 and the Galaxy S6 edge+. It's the last major mobile network in the United States to release Marshmallow for these handsets. The updates weigh in at around 1.6GB and they are now being rolled out to the aforementioned devices over-the-air.
Both of these handsets will be bumped up to Android 6.0.1 and all of the features that are part and parcel of Marshmallow will be available to users, features like Doze mode, improved notifications experience, granular app permissions, tweaked user interface, and more. The security patch level will be brought up to June 1, 2016. Those who own the Galaxy Note 5 or the Galaxy S6 edge+ on AT&T will receive an update notification soon if they haven't already got one. They can also try to grab the update by going to Settings » About device » Software update on their device.