US 5G networks, while heavily promoted by the big three mobile operators, are only slightly faster than 4G, and in some cases 5G is now slower than last year .
Read moreWhy does 5G have less coverage?
The 5G standard uses millimeter waves, which are a lot shorter than the wavelengths 4G uses . The shorter wavelength means 5G can carry a lot of data much faster than 4G, but it also means a much shorter range.
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