They're apparently making about 8$ per Android device on the (secret) patent deals: http://www.zdnet.com/microsofts-most-profitable-mobile-operating-system-andr

They're apparently making about 8$ per Android device on the (secret) patent deals: http://www.zdnet.com/microsofts-most-profitable-mobile-operating-system-android-7000015094/ http://www.zdnet.com/microsofts-most-profitable-mobile-opera... According to Google's 1 billion activated Android devices, that would make patent revenue of 8 billion $ just on that platform. This compared to the about 70 billion $ yearly revenue they're making overall.