Sixaxis Controller is not supported on Samsung Galaxy S II officially, you will get ‘Error: Missing required protocol’. Sixaxis Controller is an Android application that allows both the Sixaxis and DualShock 3 PlayStation controllers to be used as Bluetooth input device. It is a great companion for emulator games like N64, SNES… However, it is incompatible with most HTC devices and some newer Samsung devices like Samsung Galaxy S2 due to the required Bluetooth protocol not being implemented.