Is the tower signal switches to other towers automatic

Hi, when we use mobile phone from 2g onwards wer are getting mobile signal from towers near your service provider. BUt then, the cell tower name changes occasionally in the home, and it also changes while navigating.
Does the process of switching to the nearest tower , automatic or based on some algorithms.
Why even in home, there is a shift in cell tower signal connected
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why no reply for this query. is this question not compatible to this forum

why no reply . is this not a relevant topic to ask in this forum