We now have over 20 years of data and over that time phones have reduced the power of the radio transmissions they use (mostly because people demand the batteries last longer)

Even with 20 years of data (of people using phones and living near towers) there has been no correlation or statistical increase in cancer or other maladies. The problem here is you can't prove a negative and so people use that to try and muddy the waters. Nobody can prove that electromagnetic non-ionising radiation don't cause any maladies to living beings, but we sure do have a lot of data that suggests it's highly unlikely that they do. If you believe that's not reasonable for you then you can choose to reduce your exposure but please don't try and force that belief onto the rest of the population.