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2. iPhone 3G - Wikipedia

   en.wikipedia.org/wiki/IPhone_3G

   The iPhone 3G is a smartphone designed, developed, and marketed by Apple Inc. It is the second generation of iPhone, successor to the original iPhone, and was introduced on June 9, 2008, at the WWDC 2008 which took place at the Moscone Center in San Francisco .

3. iPhone 4 - Wikipedia

   en.wikipedia.org/wiki/IPhone_4

   The iPhone 4 is a smartphone that was designed, developed, and marketed by Apple Inc. It is the fourth generation of the iPhone lineup, succeeding the iPhone 3GS and preceding the iPhone 4s. Following a number of notable leaks, the iPhone 4 was first unveiled on June 7, 2010, at Apple's Worldwide Developers Conference in San Francisco, [ 7] and ...

4. List of iPhone models - Wikipedia

   en.wikipedia.org/wiki/List_of_iPhone_models

   The backs of an iPhone 6, an iPhone 7, an iPhone 8, and an iPhone SE (3rd generation) The iPhone, developed by Apple Inc., is a line of smartphones that combine a mobile phone, digital camera, personal computer, and music player into one device. Introduced by then-CEO Steve Jobs on January 9, 2007, the iPhone revolutionized the mobile phone ...

5. History of the iPhone - Wikipedia

   en.wikipedia.org/wiki/History_of_the_iPhone

   Steve Jobs presenting the iPhone 4. First iPhone on display under glass at 2007 Macworld. The history of the iPhone development by Apple Inc. spans from the early 2000s to about 2010. The first iPhone was released in 2007. By the end of 2009, iPhone models had been released in all major markets.

6. iPhone - Wikipedia

   en.wikipedia.org/wiki/IPhone

   The iPhone is a smartphone produced by Apple that uses Apple's own iOS mobile operating system. The first-generation iPhone was announced by then–Apple CEO Steve Jobs on January 9, 2007. Since then, Apple has annually released new iPhone models and iOS updates. As of November 1, 2018, more than 2.2 billion iPhones had been sold.

7. Comparison of mobile phone standards - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_mobile_phone...

   In 3G, the most prevalent technology was UMTS with CDMA-2000 in close contention. All radio access technologies have to solve the same problems: to divide the finite RF spectrum among multiple users as efficiently as possible. GSM uses TDMA and FDMA for user and cell separation. UMTS, IS-95 and CDMA-2000 use CDMA.

8. iPhone 4s - Wikipedia

   en.wikipedia.org/wiki/IPhone_4S

   The iPhone 4s[ a] is a smartphone that was designed, developed, and marketed by Apple Inc. It is the fifth generation of the iPhone, [ 12] succeeding the iPhone 4 and preceding the iPhone 5. It was announced on October 4, 2011, at Apple's Cupertino campus, and was the final Apple product announced in the lifetime of former Apple CEO and co ...

9. History of mobile phones - Wikipedia

   en.wikipedia.org/wiki/History_of_mobile_phones

   One of the main ways in which 4G differed technologically from 3G was in its elimination of circuit switching, instead employing an all-IP network. Thus, 4G ushered in a treatment of voice calls just like any other type of streaming audio media, using packet switching over mobile network via VoLTE .