Install OxygenOS 3.5.6 on OnePlus 2 [Stable Android 6.0.1]

The 2nd Flagship of OnePlus OEM got Stable Android 6.0.1 Marshmallow on the first quarter of 2017 with VoLTE Functionality, UI improvement and many more new features. This is the Solid Update from Chinese OEM team for the OnePlus 2 which include all the features of OnePlus 3 including fully VoLTE support specially for Reliance Jio SIM in India (Full  update log given below). This is an Official