Why does a cell tower need to be massive to transmit data to a smartphone but the phone’s extremely small antenna can transmit data back over the same distance?
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Think of a cell tower as a big, loudspeaker that needs to talk to many people who are far away. It needs to be big and powerful to send its message far and wide to reach all the people it needs to talk to.
A smartphone, on the other hand, is like a small microphone that needs to talk back to the loudspeaker. It doesn’t need to be as big or as loud because it only needs to send its message back to the loudspeaker which is closer. It’s also really good at listening to quiet sounds, so even if the loudspeaker is far away, the smartphone can still hear it and talk back.
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