It isn't the actual frequency that GSM transmits on that causes the issues. It is because the timing of the data bursts is at an audible frequency that actually causes the ditditditdit noises you hear on speakers/radios.
Huh? 850MHz is wwaayy above any creature's hearing ability. What did you really mean there?
Exactly what he said, I expect. You don't hear the carrier frequency. But if it transmits a packet (or a byte, or whatever) at a regular rate of (say) 100 times a second, there's a 100Hz frequency component present, and that's the component which the speakers reproduce and which is audible.
Peter
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