The new iPhone 4 in black features a striking stainless steel surround that not only looks good but also boosts the signal for GPS, WiFi and Bluetooth. Measuring just 9.3mm this newly designed iPhone is one of the thinnest smartphones available. The amazing retina display has a resolution of 960 x 640 pixels making text and images appear crisp and clear. The new iPhone OS now handles multitasking and with the same processor as the iPad flicking between applications is a seamless experience. The camera has been upgraded to a 5 megapixel resolution and the built-in flash ensures you capture the moment even in low light. The phone features a front facing camera for video calls and the rear camera can also capture video clips in HD. The iPhone 4 has a better battery life than its predecessor and the iBook e-reader and WiFi technology have also been improved.