Dust fix for Nokia Lumia 920's front-facing camera is now ready
the sheath put on, which will prevent dust from entering the device, and the screen replaced for free. The whole problem is a design flaw that left a gap above the camera which lets the dust come through.
Believe it or not, dust is a major problem when enough of it accumulates inside your phone. This is why some manufacturers like Sony and Samsung are not only protecting their high end models against damage from water, but are also dust proofing these same models as well.