Here is a short tutorial using which you can root Android 6.0.1 Marshmallow firmware in no time. Android One users are lucky indeed as they receive the latest updates from Google so early and being budget phones makes these devices even more likable. Following the Nexus series, the Android One devices have also been receiving similar devices.
If you have a Nexus device then it’s most likely that you have already installed the OTA update. A lot of devices have been receiving the latest Android 6.0.1 Marshmallow update from Google.