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Why do the cell-phones use higher frequency bands Ghz and not lower ones Khz-Mhz?

April 26, 2017bands Frequency GHz lower

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Why do the cell-phones use higher frequency bands Ghz and not lower ones Khz-Mhz?

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The lower bands are already in use, and have been for many years. Additionally, the higher frequencies allow the use of very small antennas and some other components that reduce the size of the phones. Microcircuits for microwaves.