Alright, we are moving on from Android 6.0 Marshmallow to Android 6.0.1 as the update is now available to Android One phone as sold by Google. Selected Android One owners are receiving the Android 6.0.1 Marshmallow update.
This update doesn’t bring up any new features but yes it does include some bug fixes and other stability improvements. The update seems to be in to very early stage of roll out that only limited number of people are seeing this available on their device. It might not be available to you right now. As reported Cherry Mobile G1 as sold in Philippines is receiving this update.
You can also force check for update by going through Settings > About Device and then tap on Software update tab.
Source : Reddit, @LlabTooFeR via Android Beat