The most prominent and noticeable feature of the iPhone is the huge touchscreen. At a size of 3.5 inches and a resolution of 320 x 480 at 160 ppi (pixels per inch), it is arguably the best display on a mobile phone in the market. And as if the cake wasn’t delicious enough, the revolutionary Multi-Touch user interface is the frosty icing on it that really steals the show. Armed with features such as multi-finger gestures and the ability to ignore unintended touches it eliminates the requirement of a stylus and allows the user tc interface with the phone using just their fingers with dead-on accuracy. Steve Jobs wants you to believe that it “works like magic,” but we’ll have to wait and see how much truth there is to that.

The most prominent quality of the Multi-Touch screen is its ability to recognise more than one finger and gestures made with fingers. It can identify whether you are touching it with a single finger or two. So, while browsing a Web page, for example, you can click with a single finger to open a link and use two fingers to scroll around. The finger gestures functionality is somewhat simi lar to mouse gestures in the Opera Web browser. You flick your fin ger lightly over the screen in whichever direction you want it to scroll to and does that. It is an effortless and convenient way :c scroll around on the screen. This also eliminates the need for a scroll bar, utilising the precious screen real estate for displaying the content. The most fantastic feature of the Multi-Touch inter face is the pinch-and-zoom feature. Whenever you need to zoom in on anything on the screen, you simply hold the tips of your index finger and thumb together, touch the screen and pull your fingers apart. To zoom out, you simply reverse the action. Not only is this a very cool feature, it also gives you a sense of actually touching your data. You really have to see this one to believe it!

The iPhone Operating system 

 The second great feature, which in our opinion is greater than the first one, is that iPhone runs OS X. The operating system that makes the Macintoshes such great computers can now be carried in your pocket, at a fraction of the cost. But why would we want to run such a sophisticated OS on a mobile device? Well, because it has everything the phone needs. It has multi-tasking, the best network­ing, it already knows how to power-manage. Apple has been doing this on their notebooks for years; it has got awesome security and the right applications everything from Cocoa (object-oriented pro­gramming for next generation applications) and the graphics, and it’s got Core Animation built-in (a technology in Apple’s next oper­ating system, Leopard, which lets developers create groundbreaking applications) and the audio and video that OS X is famous for.Above all, the base of OS X means that the applications and networking on the iPhone are truly desktop class. What this means is that the e-mail client, Net browser, music player, photo manager, calendar, maps application, etc. all work as you would expect them to on its Desktop counterpart, Mac OS X. These are not crippled software with severely reduced functionality like most software found on Symbian and Windows Mobile devices. The Internet browser lets you view fully functional HTML Web pages, the e-mail client shows you the full contents of your e-mail as you would see them on a computer, and the photo management application is the best one we’ve ever seen. iPhone owners will actually use these applications for serious work, rather than just as a novelty. This also ensures that the iPhone is fully multi-task­ing. So you can, for example, read a Web page while downloading your e-mail in the background.Synchronisation with PC and macThe iPhone syncs with both Macs and PCs using the same thirty-pin dock connector that the iPods use. The syncing is done through iTunes. Jobs said they were learning from the iPod. Apple is going to ship their hundred millionth iPod this year, so there are tens of mil­lions of people out there who know how to sync their iPod with their computer through iTunes. All you have to do is place your iPhone in the dock, and it automatically syncs with your PC or Mac through iTunes, simultaneously charging itself. iTunes will not only sync all the media content with the iPhone (audio books, movies, music, music videos, podcasts, and television shows), it will also sync all the data between the computer and the phone (bookmarks, calendars, contacts, e-mail accounts, notes and photos

Advaced and revolutionary Innovations in iPhone

There are many unique innovations in the iPhone. One of them is the use of three really advanced sensors in the phone—the accelerometer, ambient light sensor, and proximity sensor. “iPhone’s accelerometer detects when you rotate the device from portrait to landscape, then automatically changes the contents of the display, so you immediately see the entire width of a web page or a photo in its proper landscape aspect ratio. The proximity sen­sor detects when you lift iPhone to your ear and immediately turns off the display to save power and prevent inadvertent touch­es until iPhone is moved away. An ambient light sensor automati­cally adjusts the display’s brightness to the appropriate level for the current ambient light, thereby enhancing the user experience and saving power at the same time.” Apple has filed for over two hundred patents for new innova­tions in the iPhone. The iPhone comes in two variations with the only difference between the two being the storage capacity. Both of them have mammoth storage, with onboard Flash memory of 4 and 8 GB. It is a quad-band (MHz: 850, 900,1800,1900) GSM phone and is equipped with a lot of connectivity options. It has Wi-Fi (802.11b/g), EDGE, and Bluetooth 2.0 with EDR (Enhanced Data Rate). It also has a 2MP camera onboard. Apple claims that it can play 16 hours of audio or 5 hours of talk time, video, or browsing between recharges. It is also backward-compatible with most iPod accessories. Now let us dig deeper and explore the three main fea­tures of the iPhone.