Three doesn’t rely on just one frequency band for its mobile network. In fact, it uses quite a few of them, namely the 700MHz, 800MHz, 1400MHz, 1800MHz, 2100MHz, 3400MHz, and 3600-4000MHz frequencies.
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Audio Frequency Subsets Frequency SubsetFrequency RangeLower Midrange250 to 500 HzMidrange500 Hz to 2 kHzHigher Midrange2 to 4 kHzPresence4 to 6 kHzUnderstanding Audio Frequency Range in Audio Design www.cuidevices.com › blog › understanding-audio-frequency-range-in-au…
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