iPhone 3GS has the latest of everything, including 3-megapixel autofocus camera, Video recording, Voice Control and Digital compass. According to Apple, everything you do on iPhone 3G S is up to 2x faster and more responsive than iPhone 3G.
If you already have a iphone, The free iPhone OS 3.0 Software Update includes some great new features, here is how to update your iphone OS.
Considering an iPhone ? here is the iPhone 3GS feature comparison with iPhone 3G.
iPhone 3GS vs iPhone 3G Comparison
[ Image via- WSJ ]