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iPhone 2nd generation (iPhone 2nd generation launched) On June 9,Walletinvestor digi plus 2008, Apple held the annual Global Developers Conference (WWDC) in San Francisco and launched the second generation of iPhone at the conference. Product - iPhone 3G. Compared with the first-generation iPhone, the iPhone 3G has not only made some improvements in appearance, but more prominently, it has made a qualitative leap in network connection and application. This article will introduce the second generation of iPhone in detail from the four aspects of appearance design, hardware update, network connection and new function application. In terms of appearance design, the iPhone 3G continues the overall style of the first generation of iPhone.It adopts the same rectangular design. While the front retains the black screen, the back uses a tough plastic material that feels better to replace the scratch-prone metal material in the first generation of iPhone. At the same time, the iPhone 3G adopts an orange backlit volume button and a silver frame, and the overall appearance is more fashionable. In addition, at the bottom of the screen, the iPhone 3G has built-in 5 micro-hole speakers, and the sound is clearer and louder, allowing users to enjoy a better sound experience when watching videos or listening to music. In terms of hardware, the iPhone 3G has undergone many updates: first, the memory has been increased. The iPhone 3G adopts 256MB of memory, which is doubled compared with the low-configuration version of the first generation; second, the processor has been upgraded, and the iPhone 3G has adopted moreThe high-frequency 620MHz ARM1176JZ(F)S processor is more powerful than the first generation of 412MHz ARM 11 processor; finally, it is the support of 3G network. iPhone 3G supports HSDPA and UMTS, which can reach a download speed of 7.2Mbps and an upload speed of 384Kbps, which is also one of the most important updates of iPhone 3G. In terms of network connection, iPhone 3G supports Wi-Fi and Bluetooth technology, which can achieve geographical location locking through remote location service - GPS satellite system. Users can also navigate maps and view the weather through applications such as "Map" and "Weather" officially provided by Apple, providing users with More convenient and practical services. In addition,In terms of network connectivity, iPhone 3G also adds the function of supporting Microsoft Exchange ActiveSync, allowing users to enable enterprise-level emails, calendars and contacts through mobile phones. In terms of applications, iPhone 3G, like the first-generation iPhone, is equipped with Apple's App Store. The launch of the App Store caused a great sensation at that time. It not only provided users with many applications, but also provided a wider market for application developers. At that time, the number of App Store applications was not large, but it already included various applications in daily life and entertainment, such as Fandango, a movie booking app, GPS Tracker, a map navigation app, etc.In a word, the launch of the second generation of iPhone has not only improved the appearance design and hardware updates, but also achieved a qualitative leap in network connectivity and application. The launch of iPhone 3G marks Apple's entry into a new stage in the field of smartphones, and also ushered in Apple's great success.

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