SAR is a buzzword, invented to sell phones. We evolved with much higher SAR of electromagnetic energy than any cellphone is capable of - if you see a lightning strike, the SAR you're being subjected to is in the hundreds, at least, depending on how many miles it is from you. The SAR from sunshine (also electromagnetic radiation) is in the thousands on a cloudy day. (Yes, if you lie on the beach in a bathing suit [or, for women, a small bikini] for hours, you'll get a touch of radiation poisoning, but that goes away in hours.)
Police, using 5 Watt (or more) radios, are subjected to much higher SARs, and the antenna these days is (depending n the officer's preference) pretty close to the head.
Ham radio operators are subject to SARs in ... I won't post the number, because no one will believe it, but I carried the scar of a burn produced by contact with an antenna when the transmitter was transmitting (someone couldn't see a sign in 144 point type) for years.
The only thing EM radiation causes, until we get to much higher frequencies than are used for cellphones, is heating. (Google radiodiathermy - doctors used to shoot 25 Watts into a sore muscle to ease the pain.) So even if the SAR of a phone was 2 or 3, all it would do is heat your ear by an unmeasurable amount. (There's never been a case of a cancer linked to EM radiation.) Mr Segundus has it on the nose - the article is about as relevant to reality as the anti-vaxxer nonsense (which was originally pushed by a doctor [who had his medical license lifted for doing it] who raised the issue because a law firm that wanted huge lawsuits paid him to).
Besides, the lower the SAR, the lower the signal the phone is putting out, so the worse it's going to perform. (And no one takes into account that SAR varies directly with the strength of the received signal, because cellphones raise their transmit power if the received signal is weak.)
As Mike said, it's a ridiculous article.