Created as a sophisticated alternative to the clear film protectors we've reviewed and liked from companies such as FullBodyFilms, NLU Products, and Zagg, United SGP Corporation's new SGP Shield for iPhone 3G ($26) combines a clear thermoplastic urethane rear film layer with a Steinheil premium hard face film to offer comprehensive iPhone 3G coverage. The rear film resists yellowing, scratches, and tearing, while the front film is based upon Japanese…
