Two companies seem to tower above the rest when it comes to screen protector quality, and United SGP is one of them. New to its lineup is the Steinheil-branded Ultra Optics series of screen films for the iPhone 4 ($16), a two-pack of front face protectors that use an interesting technology to reduce fingerprints while preserving the device's original glossy finish. The film is precision cut to fit the front of the iPhone 4, leaving camera, speaker,…
