As promised earlier, HTC is rolling out Android Marshmallow 6.0 update to HTC One M9 unlocked version. HTC's VP of Product Manager MO Versi has revealed via his twitter account that the Android Marshmallow update will be rolling out to HTC One M9 in next 24 hours. However the update is rolling out to unlocked versions of the M9 in the US and has not commented on the global rollout yet.
Versi also revealed that the HTC is also rolling out Android Marshmallow 6.0.1 update to the recently launched One A9.