Until the 1990s, an operator could install a wireless tower almost wherever it pleased and with minimal objection from local communities. It didn't take many towers to support an entire region because there weren't many customers in the first place and most of the data was simple voice. Then towers grew taller, bringing concerns about everything from aesthetics to radiation. Now, with data services proliferating and citizens more astute than ever, there are new trends emerging in tower equipment colocation. Electronic interference and tower design are among the major issues, both being consequences of other technology evolutions. There's also cost, an issue that never goes away.
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