This is a simple attack helicopter that should be able to fly perfectly on most mobile devices. AG1- Allows Persise Movent Control with VTOL slider. AG2- Activates turret controls and adds more stability. AG3- Powerful Gyro Used to help hover and land. AG4- Jet Engines. AG8- Main Gyro. I recommend you turn off 8 while hovering and just using the cannon because cannon and movement controls interfere with each other often, also when multiple gyros are activated at once craft can be shakey, but it should remain stable.