Smartphones have been under development since the early 90 鈥檚, when the first smartphone called 鈥淪 imon 鈥?was introduced by IBM. Today, the computing power of a desktop computer and the connectivity of a mobile phone are just within your grasp. The most advanced smartphone you can get is an unlocked iPhone, which isn 鈥檛 tied up to any service provider. A smartphone is a mobile phone that offers more advanced computing abilities and connectivity than regular phones sold on the market. The first smartphone was a primitive one by today 鈥檚 standards. Besides the regular calling features of a mobile phone, it had a clock, a calendar, an address book, a calculator, a notepad, e-mailing features, and it could send and receive fax. It also had the first commercially available touch screen pad. Today, the most advanced smartphones provide all the services of a mobile phone plus the computing power of a desktop computer, a fully functioning high resolution digital and video camera, a portable music player, and many more. The most sought after model of smartphone is the iPhone. Today, the latest available model of an unlocked iPhone is the iPhone 4. The iPhone, apart from being a mobile phone, has a number of features that make it great. It has a touchscreen liquid crystal display (LCD) and a virtual keyboard for input. It is made out of strong aluminosilicate material and stainless steel. It also has an advanced five megapixel digital camera, capable of capturing images and video. The latest version of the iPhone, the iPhone 4, can record and playback images in high definition (HD). The iPhone 4 can store your music in its music library. You can store and watch movies in the video library. It has two microphones for crisp sound recording and noise cancellation, which filters out background noise. You can also have internet access through an unlocked iPhone. Just find a Wi-Fi connection and you will be able to surf the net and check your email easily. A popular feature of the unlocked iPhone is the use of third-party applications. These applications are made by third-party software developers using software provided by Apple itself, and usually are fun and usable programs for all types of consumers. A new feature of the iPhone 4 is called FaceTime. The phone has two built-in cameras for real time video calling to another iPhone 4. The Retina Display, meanwhile, is a highly advanced display technology which gives it the highest resolution phone screen of all smartphones. The iPhone 4 is designed to be very easy to use. The hardware and physical interface are very user-friendly and don 鈥檛 confuse the user with too many buttons and options. The virtual interface is also easy to navigate. You will get to the feature you want with just a few taps of your finger. There are many capabilities and features that an unlocked iPhone has that make it a lot better than other smartphones in the market. Each feature enhances the overall value of the iPhone and makes it a product worth getting. When you get an unlocked iPhone, you can use any service provider you want and still enjoy the phone 鈥檚 best features. Lawrence Foster is a mobile phone professional who knows where to get an iPhone unlocked. For more information, go to PureMobile.com today.