The HTC One M9 has been out ever since April and it came with Android Lollipop under the hood. HTC promised to give quicker updates this time around, and it looks like that is coming to fruition. Known HTC-leaker LlabTooFer has leaked screenshots of an HTC One M9 device running Android 6.0 Marshmallow and Sense 7.0.
The screenshots show off the One M9 running what looks mostly like a Sense UI, but with the new Android Marshmallow features. The main features of Marshmallow have been added such as app permissions, new centralized volume controls, and the new RAM management tab. While it is still very much the Sense UI, it has kept more of the stock Android looks here and there. The entire screenshot gallery can be seen below.