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Other Specifications
--It supports WMA, MP3, VBR, Apple Lossless, and WAV output. Therefore, the frequency of the audio ranges from 20HZ to 20,000HZ, depending on the audio format.
--You can access wi-fi on the I-phone 3G but only if you have the tariff from your network provider.
---The ... Read review
Yes it certainly is, the 3G connection makes the internet much, much faster than the previous version. The only thing to be aware of is that it has a significant impact on battery life if you leave 3G switched on the whole time.
Hope that answers your question.
Benje
Introducing iPhone 3G. With fast 3G wireless technology, GPS mapping, support for more
enterprise features like Microsoft Exchange, and the new App Store, iPhone 3G puts even more features at your fingertips. And like the original iPhone, it combines three products in one - a revolutionary phone, a widescreen iPod, and a breakthrough Internet device with rich HTML email and a desktop-class web browser. iPhone 3G. It redefines what a mobile phone can do - again. Display 3.5-inch (diagonal) widescreen Multi-Touch display 480-by-320-pixel resolution at 163 ppi Support for display of multiple languages and characters simultaneously Audio Frequency response: 20Hz to 20,000Hz Audio formats supported: AAC, Protected AAC, MP3, MP3 VBR, Audible (formats 2, 3, and 4), Apple Lossless, AIFF, and WAV User-configurable maximum volume limit Video H.264 video, .m4v, .mp4, and .mov file formats Camera and photos 2.0 megapixels Camera Photo geotagging iPhone and third-party application integration