After a few months of rumors and leaks, Apple has officially announced the iPhone 4 at its WWDC 2010 event today. It has a glass front and back with a stainless steel ribbon on every side that helps hold the structure. That ribbon is actually the antenna system for the phone though it uses the same GSM/UMTS signals as the iPhone 3GS. This is not a 4G phone but just the fourth version of the iPhone. The iPhone 4 has two cameras, one on the front and a rear one that gets an LED flash added to it. The camera is now 5 megapixels with a 5x digital zoom and the ability to record in 720p at 30 frames per second.
The display on the phone has seen a nice resolution bump to 960x640 which is four times the amount of pixels as the previous generation. It is rated at 326ppi which Apple claims is beyond the limit of the human eye. Just like the iPad, the iPhone 4 uses an IPS display for the touchscreen that carries a contrast ratio of 800:1. So now not only will you get a high resolution display you are also going to get a gorgeous looking display for your enjoyment. The screen is still the same 3.5 inch size.
The same A4 processor powering the iPad makes its way into the iPhone 4 so the performance should get a nice little bump. With the new processor, the phone will use a slightly larger battery than previous generations which will see usage at 7 hours of 3G talk, 6 hours of 3G browsing, 10 hours of WiFi browsing, 10 hours of video, and 40 hours of music. The WiFi in the iPhone 4 is now 802.11n which is just nice to see.
On the software side, applications will automatically get high resolution text and buttons with the launch of the new iOS 4. Apple also says that with "a little bit of work" the developers can get the existing applications all to display at the larger resolution. Developers will also get access to a new gyroscope which gives devs "six axis" motion control between the gyroscope, accelerometer, and compass. For consumers, you can take advtange of the camera's new ability to record in HD with an iMovie app though it will set you back $4.99. The front facing camera will use a new "FaceTime" feature that works over WiFi to enable video calling. It will work between two iPhone 4's with no setup required though you can always switch to the rear camera at any time.
The iPhone 4 will be available in white or black on June 24th from AT&T. The 16GB model will cost $199 and the 32GB model $299. AT&T is also going to give a little grace period to upgrade early but it will only be six months before your contract expires. Apple also announced that the 3GS will be lowered to $99 and the 3G will disappear entirely. Pre-orders start in one week and the U.S, the U.K, France, Germany, and Japan will get it at launch while 18 other countries will get it in July.