“Trust me, its heartbreaking to find a giant scratch across your brand new iPhone 3GS. I found plenty of different of screen protectors on the market, but PhoneDevil’s Magic Screens are my favorite. They’re easy to apply, require no cutting, and come with a cleaning cloth and a smoothing card to prevent air bubbles.
You can pick from three different editions: Clear, Mirror, and Privacy.
The Mirror Edition gives your screen a mirror effect when the phone is off, and it looks quite stylish.
The Privacy edition uses special privacy material to prevent unwanted onlookers from viewing your screen; the screen appears turned off if you’re not looking at it head-on – a clever concept that works very well.” – PC World Magazine

PhoneDevil’s Magic Screen: Privacy edition protects your phone against scratches, and uses high-quality Privacy filter material for your ultimate security.
The matte surface texture hides fingerprints, reduces glare and feels great to touch. It does not reduce the touch sensitivity of the phone screen.
The premium privacy material is specifically designed to allow vertical up-down viewing of the phone screen when the phone is held in a regular horizontal position.
This means that when you use your phone in widescreen mode (e.g. for gaming, or sat-nav usage), you can still view the screen while driving your vehicle, or during frantic left-right gaming tilt-movements!