The iPhone 4 offers one of the most stylish options available on the smartphone market today. Its sleek aesthetics are just the tip of the iceberg, however, as its spec list remains relatively unrivalled.

The stunning handset is made out of metal and strengthened glass, which gives is durability as well as a feeling of premium build quality. When you hold it in your hand, it really feels like a luxury item and its specifications and features add to this.

The handset measures up at 115.2x 58.6x 9.3mm. This makes it the slimmest mobile phone in the world, but this does not mean that the manufacturer has sacrificed any features to achieve this.  The LED backlit IPS TFT capacitive touchscreen measures a generous 3.5 inches, at 640x 960 pixels.  This makes it the highest resolution screen on a mobile phone currently available, and produces image display quality which has to be seen to be believed.  The standard accelerometer and proximity sensors are included, and the screen of course also supports multi-touch input.

Depending on which model is purchased, either 16 GB or 32 GB of on board storage is provided as standard.  This level of storage eliminates the need for expandable storage such as a microSD card.  Even the basic 16 GB version is sure to prove ample to the needs of most users, as it is capable of storing thousands of tracks such as music files or downloaded apps.

The Apple iPhone series has always been recognized for its web browsing capabilities.  The iPhone 4 utilises an HSDPA connection in areas with 3G coverage to provide a fast and reliable Internet connection.  An enhanced browsing experience can be achieved however thanks to Wi-Fi connectivity which allows users to take advantage of Wireless Networks whenever they have access, be they in commercial or domestic locations, or in one of the increasing number of Wi-Fi hotspots.  The iPhone 4 is highly customisable, with users being able to carry out a multitude of tasks by connecting the handset to a computer via the USB connection.

One of the upgrades over its predecessors is the digital camera.  The iPhone 4 has a 5 mega pixel offering, which is capable of taking superb quality still images thanks to its pixel resolution of 2592x 1944.  LED flash, touch focus and Autofocus are included to simplify the task of taking great quality still images, whilst geo-tagging functions thanks to GPS and allows users to keep track of the locations at which the photos were taken.  As an alternative to still images, the camera can also shoot high definition video in 720p quality at a rate of 30 frames per second.

The iOS 4 operating system is highly customisable, and in conjunction with a powerful 1 GHz Apple A4 processor, provides a lightning fast user interface, with virtually zero lag time when operating the touch screen or any of the thousands of available apps.

Thanks to its levels of customisation and advance technology in almost every field, the Apple iPhone 4 looks set to remain on top for quite some time.