= The first application of mobile phones was in motor vehicles
Early models were heavy and not practical for people to carry them, so the main niche they initially filled was being carried in <motor vehicles>, notably trucks where drivers are commercially driving all day long.
It also helps in the case of trucks that you only need to cover a one-dimensional region of the main roads.
For example, this niche was the original entry point of companies such as:
* <Qualcomm>
* <#MCI Communications>
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