How do you remove the control panel on Simon 3?

There is a couple steps in removing this panel. First, unplug the unit and then locate the tab on the top of the unit, it has to be pushed down. When the tab is pushed down the first faceplate should drop down, exposing the keypad with the menu options. Second, you need to get a small flat head screwdriver and put it under the clip at the top of the panel. You can locate it by finding where your pushed the original tab down; it's right below that. Once you have your screwdriver under the small clip, push the clip up and pull the 2 faceplate towards you. Finally, after the second plate is down, unscrew/unplug the wires from the panel, unscrew the mounting panel and your done! Beware, depending on how your alarm is hooked this can cause a short to your household telephone lines causing them not to work!