This is a tired response that everyone memorizes but fails to back with facts.
1. There are studies showing some effects besides DNA mutation, such as heating, due to non-ionizing radiation, which could cause a number of health effects.
2. The World Health Organization classified cell phone radiation as a potential carcinogen. The CDC has stated that there is no conclusive evidence one way or the other on whether cell phones cause cancer.
Ah yes, the good old "Group 2B carcinogens" that are "possibly carcinogenic to humans". It includes lead, DDT, dry cleaning (as a job), firefighting (as a job), aloe vera extract, ginkgo extract, and pickled vegetables.
A more dangerous Group 2A includes red meat, "Shift work that involves circadian disruption", and "Very hot beverages (more than 65°C)", according to Wikipedia.
Group 1 contains UV light.
So, walking outside in a sunny day sipping coffee after eating BBQ with kimchi is probably more dangerous than cell phones. Doubly so if you're a firefighter.
I really don't get how the WHO gets to keep those lists without a severe backslash to their image. Since positive proof that something does not cause cancer is nearly impossible, both state basically that "a lot of people think those could cause cancer, none got to see any, be wary".
But walking outside in a sunny day is in a completely different category. Your comparison at the end is severely unbalanced, the Sun alone overwhelms everything else on both sides by a huge margin.
I think the point is that you likely won't do all of those things all day every day; rarely do you spend all day and night in the sun, drinking coffee every hour, and eating red meat 3 times a day.
Your phone is with you at all times of the day, always within 5 feet of your person, which means that if it leads to cancer (which we will likely find out within the next 30 years since American children are now surrounded by phones and tablets from age 5) then it's much more likely that you end up with cancer because of your phone rather than the fact that you were out in the sun for an hour every day.
The first iPhone was released in 2007. Radars have been used since WW2. Of course it's theoretically possible that cell phone radiation causes cancer to everyone but only after being largely ineffectual for 12 years of continuous use, but that's somewhat reaching, IMHO.
The sun is a known carcinogen. The fact that we do not have evidence that cellphones are a carcinogen is evidence that the effect size would be small if it exists.
This is a tired response that everyone memorizes but fails to back with facts.
1. There are studies showing some effects besides DNA mutation, such as heating, due to non-ionizing radiation, which could cause a number of health effects.
2. The World Health Organization classified cell phone radiation as a potential carcinogen. The CDC has stated that there is no conclusive evidence one way or the other on whether cell phones cause cancer.
3. I said "potentially" above.