Just a few days back HTC One A9( Aero) was found at Geekbench running Android 5.1.1 Lollipop, now the recent rumors purport a different story. The device is now expected to come with Android 6.0 Marshmallow out of the box.The information has been leaked by HTC leaker @LlabTooFeR unveiling that the Aero will launch in the October-November time slot which is quite consistent with previous rumors.

Rumor purports HTC One (A9) Aero will be getting Android 6.0 Marshmallow out of the box

Also the company has scheduled a press event on September 29 which is meant to announce the two devices i.e. A9 (Aero) and Butterfly 3 smartphone.