content: I don't quite understand the WiFi connection.  The 802.11 standard covers WiFi applications, and cellular frequencies don't apply even if they may or may not overlap.  5G covers the next generation of cellular frequencies, up to 60GHz, I believe.    The big difference between WiFi and cellular devices is that WiFi is designed to be short distance, as expected when using in a home/business environment.  Cellular signals are designed for a 'one to many' approach, where a single tower can communicate with many devices in the service area - which may be quite large.  This requires a boosted power signal, and much higher radiation emissions the closer to the tower one is.    I don't think the issue is the blanket coverage of an area - although that is definitely a problem to keep track of.  I think the main issue is with the towers being in close proximity and the fact that so many towers are needed that make those living near the towers to have more symptoms.