Stone vs iPhone 3G

In geology, stone (rock) is a naturally occurring aggregate of minerals and/or mineraloids.
Stones have had a huge impact on the cultural and technological advancement of the human race. Stones have been used by Homo sapiens and other hominids for more than 2 million years.
The Stone Age is a broad prehistoric time period during which humans widely used stone for tool making.

The iPhone is an internet-connected multimedia smartphone designed and marketed by Apple Inc. with a flush multi-touch screen and a minimal hardware interface. The devices lacks a physical keyboard, so a virtual keyboard is rendered on the touch screen. The iPhone's functions include those of a camera phone and portable media player (equivalent to the iPod) in addition to text messaging and visual voicemail. It also offers Internet services including e-mail, web browsing, and local Wi-Fi connectivity.
On July 11, 2008, the iPhone 3G was released and supported faster 3G data speeds and Assisted GPS.
On the iPhone 3G release date in the United States, many units initially failed to activate because Apple's iTunes servers were overloaded. Apple sold 1 million iPhone 3Gs in its first 3 days on sale.

After this short info, do you know the difference between these two "things"?

Well, here it is!