0 candelas per sq metre brightness and a 5.25-watt hour battery. As a comparison, the Nokia 9210, which was a market leading smart phone (shown in Figure 5.6) product in 2002, had a 4000 colour (12 bit) 110 by 35 mm display at 150 dpi with a e14http://www.isuppli.com/Teardowns/News/Pages/iPhone-4-Carries-Bill-of-Materials-of-187-51-According-to- 14 iSuppli.aspx. Making Telecoms Work Table 5.2 Four generations of iPhone January 2007 July 2008 June 2009 June 2010 iPhone iPhone 3G iPhone 3Gs iPhone 4 2-megapixel camera 2-megapixel camera 3.2-megapixel camera 5-megapixel camera plus video camera Assisted GPS Compass Ambient light sensor Voice control WiFi and GSM WiFi and EDGE 3G wide-area connectivity refresh driver cycle time of 50 milliseconds (limiting the frame rate to 12 frames per second). The device ran off a 1300-mAh lithium ion battery. A contemporary 2011 N8 Nokia smart phone by comparison has a 16.7 million colour capacitive touch screen display with orientation sensor (accelerometer), compass (magnetometer) and supports high-definition video recording and play back with 16 GB of memory, all running off a 1200 mAh battery (Figure 6.4 in Chapter 6). The iPad takes the same principles of the iPhone but translates them into a larger tablet form factor with a 9.7-inch diagonal display with 1024 by 768 pixel resolution. The device has back and front cameras and can do high-definition video recording at VGA resolution at up to 30 frames per second output to an HDTV. The device is powered by a 25-watt lithium polymer battery. Select www.nokia. NOKIA Figure 5.6 Nokia 9210 Introduced in 2002. Reproduced with permission of Nokia Corporation. Wireless User Hardware 5.2.5 Data Capabilities Data is data but includes text, which includes as we said earlier Twitter and related text-based social-networking entities. Much of the narrative of Chapter 5 and other chapters in our original 3G Handset and Network Design centred on the transition from delivery bandwidth added value to memory bandwidth added value. This happened