Check out this screen guard from the house of Mobizoid that will protect the screen of your Microsoft Lumia 640 Dual SIM from dirt and dust. It perfectly fits the screen and features ideal cut outs so that you can use your phone without any hassle. The unmatched clarity and anti dust protection layer of the screen guard protects your device from dirt and dust. One of the most important features of the screen guard is its non adhesive back, which ensures that the screen of your smartphone looks like new when you remove it. The scratch resistant coating of the screen guard makes it last for a long time.