OnePlus Phone Operating System (OS) version Specs

OnePlus 3Operating System (OS) version SpecsAndroid OS, v6.0.1 (Marshmallow)
OnePlus XOperating System (OS) version SpecsAndroid OS, v5.1.1 (Lollipop)
OnePlus 2Operating System (OS) versionAndroid OS, v5.1 (Lollipop), upgradable to v6.0.1 (Marshmallow)
OnePlus OneOperating System (OS) versionAndroid OS v4.4.2 (KitKat), upgradable to v6.0.1 (Marshmallow), CyanogenOS 13.0.1.