“Data” isn’t a physical thing, it is a concept. Suppose for example we have a sailor on a ship who wants to know if the local tavern has grog before he docks his ship. He agrees with the tavern owner that the tavern will fly a red flag if there is grog. Obviously if the sailor sees the red flag he gets the data that there is grog, but the flag isn’t data. It doesn’t *contain* data.
Suppose there is no grog so the tavern doesn’t fly a red flag. In fact the tavern owner never even had the red flag made. Where is the data? It isn’t *anywhere*, it is an **idea**.
Cellular data is transmitted via changes in microwave emissions from cellular towers. The costs involved include the building, operation, and maintenance of those towers and associated network, along with whatever fees are associated with communication with the greater internet.
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