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Why? 2G (GSM) uses time division multiple access (TDMA). The phone transmits in rapid 217 Hz pulses (on/off bursts). 3G (UMTS) uses code division (CDMA). It transmits in a more spread-out way. Less pulsing = fewer sharp current spikes = weaker ELF fields. 4G probably lies in between 2G and 3G, leaning closer to 3G’s behaviour. 5G is unpredictable.
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