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4G is the fourth generation of cellular data standards. Like 3G, there is no single 4G technology. Instead, 4G an umbrella of technologies that conform to the requirements established by the International Telecommunications Union. All 4G devices must support a data transfer rate of at least 100 Mbps.

4G networks and devices were first available in the United States in 2009. Sprint was the first company to offer 4G service, followed by Verizon, AT&T, and T-Mobile.

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