It is recommended that you test your HDML services extensively to make sure they are easy to use. Because HDML and the UP.Link platform support a wide array of devices, it is important to test your services with the "least common denominator" device--the device with the smallest display. The "least common denominator" phone is currently the Mitsubishi phone. You can configure the UP.Simulator to emulate a Mitsubishi phone. For more information, see the UP.SDK Tools and APIs Reference.