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A cellular network or mobile network is a radio network distributed over land areas called cells, each served by at least one fixed-location transceiver, known as a cell site or base station. In a cellular network, each cell uses a different set of frequencies from neighboring cells, to avoid interference and provide guaranteed bandwidth within each cell.

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Able to text and use internet, but no phone calls

The other comment should be correct: your phone only supports the 4g/5g bands in your area and doesn't have 3g. You could check by setting your phone to use 3g only and seeing if there is still signal …
ivey kun's user avatar