The LCD Screen need the "mask"

If you don't use the cellphone for a long time,you can turn off the screen by function key on the keyboard. In addtion to saving the electricity can also make the screen life longer.
Please don't forcibly cover the LCD above cover or place anything between the keyboard.
Please don't use fingernails and sharp objects(hard object) so as not to cratch the surface of touch screen.
The LCD screen will has some dust due to electrostatic,it is recommended to buy special cloth to clean your screen.
Don't use the finger to avoid leaving finger print.
Don't use chemical cleaning to clean the screen.

form: http://www.agoodic.com/