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Older phones had much higher output due to the need to reach distant cell towers. Older bag phones had outputs of almost 5 watts of power. Now with so many cell towers cell phones don't need that kind of power and common power outputs of todays cell phones is more like.5 watts (500mw).
Cell phones give off non-ionizing radiation much like the sun. If you're standing on a sun drenched beach talking on your phone the sun is dosing you 350 times the amount of radiation from your phone.0