If you are in the market for a new mobile phone, you might be thinking about the LCD screen. This is the part that displays all the graphics and information on a mobile device. You need to make sure that the LCD screen is working correctly before you make the purchase. The best way to do this is to test it on your own device. But, if you don't have any devices to test, you'll have to buy one that works for your model. The problem is that these boxes are very expensive and you might not be able to afford them.