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appstore.com. The App Store is an app marketplace developed and maintained by Apple, for mobile apps on its iOS and iPadOS operating systems. The store allows users to browse and download approved apps developed within Apple's iOS SDK. Apps can be downloaded on the iPhone, iPod Touch, or iPad, and some can be transferred to the Apple Watch ...
iPhone. 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.
It is the operating system that powers many of the company's mobile devices, including the iPhone, and is the basis for three other operating systems made by Apple: iPadOS, tvOS, and watchOS. [ 9 ] iOS formerly also powered iPads until iPadOS was introduced in 2019, and iPod Touch devices until its discontinuation.
The iPhone 3GS,stylised as iPhone 3G🅂,[a]is a smartphonethat was designed, developed, and marketed by Apple Inc. It is the third generationof the iPhoneand the successor to the iPhone 3G. It was unveiled on June 8, 2009[6]at the WWDC 2009, which took place at the Moscone Centerin San Francisco.
The iPhone comes with a set of bundled applications developed by Apple, [69] and supports downloading third-party applications through the App Store. [70] Apple provides free updates to iOS over-the-air, or through Finder and iTunes on a computer. [71] Major iOS releases have historically accompanied new iPhone models. [72] [73]
In September 2008, AT&T announced that it would also sell the iPhone 3G in Puerto Rico and the U.S. Virgin Islands. [76] The iPhone 4 was released on June 24, 2010. According to Apple, over 1.7 million iPhone 4 units were sold in the first few days, which is the most out of any phone ever sold. These sales propelled AT&T to strong Q2 results.
Later 3G releases, often denoted 3.5G and 3.75G, also provide mobile broadband access of several Mbit/s to smartphones and mobile modems in laptop computers. This ensures it can be applied to wireless voice telephony, mobile Internet access, fixed wireless Internet access, video calls and mobile TV technologies.
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.