Speed
Load web pages, launch apps, open attachments, and take pictures faster than ever before. iPhone 3GS makes your entire iPhone experience more responsive.

Up to 2x faster compared with iPhone 3G.
 
Video Camera
iPhone 3GS now lets you shoot and edit video, then share it via email, MMS, MobileMe, or YouTube. And still pictures get better with a 3-megapixel camera, built-in autofocus, and a tap-tofocus feature.
 
Voice Control
With Voice Control, you can use your voice to call someone in your contacts list, dial a number, or play a song.

Additional Features:

Digital Compass

*Compass reliability may be affected by usage conditions, such as nearby magnetic fields.
 
Cut, Copy & Paste
Cut, copy, and paste words and photos, even between applications. Copy and paste images and content from the web, too.
 
Messages
Use messages to send text, photos, audio, video, and more. Forward a whole message or just the important parts.
 
Spotlight Search
Find what you’re looking for across your iPhone, all from one place. Spotlight searches all your contacts, email, calendars, and notes, as well as everything in your iPod.
 
Voice Memos
Capture a voice memo, a meeting, or any audio recording on the go. Use the built-in iPhone microphone or the mic on your headset to record audio.
 
Landscape Keyboard
Want more room to type? Rotate iPhone to use a larger keyboard in Mail, Messages, Notes, and Safari.
 
Accessibility
Accessibility comes standard on iPhone 3GS. From closed captioning to TTY support, Apple builds accessibility right into the iPhone operating system.
 
Visual Voicemail
See your voicemail. Visual Voicemail shows a list of your messages, so you can play them in any order.