5G is the fifth generation of cellular technology, and is the successor to 4G/LTE.
5G will take advantage of many chunks of spectrum ranging from long range UHF frequencies up through short range extremely high millimeter wave frequencies.
When broadcast over long range frequencies, 5G may only have a modest speed improvement over 4G/LTE - but in core urban and suburban areas that are frequently overloaded the extra capacity that 5G brings to cellular should allow for dramatic overall improvements.
NOTE: 5G cellular and 5Ghz Wi-Fi are entirely different things.
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