Cyanogen 13.1 is rolling out to the OnePlus One. The OnePlus One will feature MOD, an integrated mobile platform that was first announced in February and is now officially available. MOD enables mods on phones or “ intelligent, contextually aware, and lightweight experiences built natively into the mobile operating system.” 

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Source: Hot Hardware – Cyanogen 13.1 For OnePlusOne Gains New Microsoft Hooks Including Cortana Selfies