eli5 Why do internet calls such as WhatsApp sound clearer than normal cellular calls?
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Cellular calls have always been made to be as lightweight as possible due to the limited bandwidth of early phone networks.
Some reasons this has remained: It’s good enough, it’s stable, and it has a much greater range (sometimes when you’re out in nature you might only have a bar or two of reception but no internet).
However, nowadays many mobile phones have a VoIP setting which lets you make calls over the data network instead (if both phones have it activated, I’m pretty sure) which should sound much clearer.
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