This simulator shows an imaginary cell phone running a map application based on your map content.
The app is not exactly like any real app but it gives a hint of the real apps. The most important benefit you can get from the simulator is to check the menu structure - and the content overall.
To simulate multi-touch, hold Ctrl-button down and drag with your mouse.
To simulate GPS position, click the bottom left button. A map window appears on the right side of the simulator. Then click the map in the preferred location. You will see a red ball on the map (if your position is on the map area). Remember that for this, you have had to put GPS binding to the map image in the editor (by clicking GPS points tab and setting three GPS reference points in minimum).