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In amateur radio, the power output is much much higher. Handi-talkies can be up to 5 Watts. I remember the biggest concern was a wavelength which matched the optic nerve, about 3-6 cm. Most HT's are 2m/60cm.
I think most of the cell phones these days max-out around 300mW. And most of the time they run far lower output.
As far as "heating" is concerned, the reason microwave ovens use the specific frequencies they do is that they are readily absorbed by water. And 1200 WATTS takes a minute to boil a 8 oz (250ml) of water.
Assuming 10% of a 300mW signal were absorbed, that is 30mW. (I say 10%, because if 100% of the signal were absorbed, the call would drop.) 30mW can hardly cause any heating.
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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