Wow, apple iPhone 3G 16GB unlock is now available from buy.com for $799 with full Apple Warranty. Apple iPhones have typically been locked to only use on the AT&T network, so they are not capable of being used on other GSM carriers such as T-Mobile or for overseas travel. Now the iPhone is available without any locks or restrictions to any GSM carrier. 

Also, the Apple guarantee is valid for all never-locked iPhones. You are now able to:

• Connect the iPhone to iTunes
• Update the iPhone software when the updates are available from Apple
• Purchase apps from the iTunes library or the Apps store on the iPhone
• Use AT&T or T-Mobile in the USA Or one of the 30 different GSM carriers all over the US.
• Use with any GSM carriers globally Introducing iPhone 3G. With fast 3G wireless technology, GPS mapping, support for 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.