Agree the heat is the only 'risk', and that emitted by your handset has greater strength than mast;
Does
look like the mice experiments are more concerned by impact on sperm, so hands-free calls with your phone in a pocket could be the risk, compounding lowered fertility.
5g largely, seems the future promise of mobile, must have, applications that will soak up this additional bandwidth, if it's not providing an efficient alternative to home fibre,
so I am watching the space to see what these apps are ; cloud connected cars seems it, for near future;
perhaps 5g phone battery life, now, is better than 4G, but it lasts a day now, so if we were back to days of 3310 days, it's not compelling.