Steve Jobs, CEO of Apple Inc. introduced the new iPhone 4 at Apple’s WWDC 2010 conference on June 7, 2010. As smartphone lovers, we are curious… what’s so special about the fourth version of the beloved iPhone.

First of all, the new iPhone 4 has a new design. The design of this model is quite different from its previous models. You now have all new stainless steel around you for added strength. Furthermore, these stainless steel also work as a set of integrated antennas for GSM, UMTS, Bluetooth, Wi-Fi and GPS. This is what is known as brilliant engineering. The new iPhone 4 is the thinnest smartphone ever, at just 9.3mm thick, 24% thinner than today’s thinnest smartphones.

The second, a new high-resolution display that doubles the pixels in each direction (960 x 640) for a 4X total pixel increase. Apple calls it “Retina Display.” Because it has four times as many pixels, it displays very, very sharp text. This display is rated at 326ppi, which Apple claims is beyond the human eye’s limit of distinction, which is 300ppi. It also has a contrast ratio of 800:1, which is also 4 times better than the current one. And the screen is similar to the IPS screen on the iPad but still the same old 3.5-inch size.

Third, the iPhone 4 is powered by the A4 chip, which is Apple’s custom chip. What they have done differently is that they reduce the size of the chip so that they can increase the size of the battery. So now improved battery life with 7 hours of 3G talk, 6 hours of 3G browsing, 10 hours of WiFi browsing, 10 hours of video, 40 hours of music… and 300 hours of standby.

Number four, Apple iPhone 4 has another new piece of hardware known as the Gyroscope with a 3-axis gyroscope.

Apple has tied up the gyroscope and accelerometer, the six-axis compass, which is perfect for gaming. The camera has been expanded to 5 megapixels, with 5X digital zoom and an “illuminated sensor on the rear”, which can now also record HD video at 720p/30fps. Plus many more features like tap to focus video, built-in video editing, one-click sharing, and LED flash.

On the software side, Apple has made a huge improvement with the introduction of multitasking. Which is what all of us apple lovers missed in the past. But now it’s there with the best of all multitasking features available for any smartphone on the market. Other software enhancements include the Application Folder, new unified mail inbox and threads, new iMovie, and the introduction of iBooks for iPhone.

Another important feature of this new iPhone is the introduction of advanced video calling features known as “Face Time”. It’s a video call from one iPhone 4 to another anywhere there’s Wi-Fi with no setup required, it can be used in both portrait and landscape mode with front and rear cameras.

The phone will be available in black or white, with a retail price of $199 for the 16GB model and $299 for the 32GB model. They will go on sale on June 24 and AT&T will give them extra update time, up to six months before. The 3GS will drop to $99 and the 3G will be gone entirely. Pre-orders start in a week, with 5 countries at launch (US, France, Germany, UK, Japan), and 18 more in July. Apple will also sell a first party case for $29 and a stand for the same price.

So with this, I think there are a lot of special things about the new iPhone 4 from Apple.