From last few weeks Android devices (Not all) are getting Android 6.0 Marshmallow update, but in the meanwhile Android One (Model number: H220) has got the Android 6.0.1 update. This update was released today for Android One devices. if your Android one device has not got this update then wait for a while it might hit soon.
This Android 6.0.1 OS update is some minor repair and bug fix updates. I believe this is just a test done of cheap models before releasing the update for flagship phones like Nexus 6. They haven’t released any notice about what exactly this update is all about, hence I cannot predict it.
If you are one of them who have got this update, you can guide users and us through the comment below.