Even though the upcoming HTC One A9 handset has been recently spotted at GeekBench running on Android 5.1.1 Lollipop, renounced leaker @LlabTooFeR claims otherwise. According to him, the device will be coming with Android 6.0 Marshmallow along with their own HTC Sense 7.0 out of the box.
Hima_Aero will run Android 6.0 and Sense 7 GP on the launch…
— LlabTooFeR (@LlabTooFeR) September 14, 2015
Similarly, he also confirmed that the device will be available launched around the October – November time frame although he did not explicitly tell us when will it be.
Similarly, reports have also suggested that the Taiwanese company will officially announce this handset along with the Butterfly 3 smartphone during the September 29 press event.