I call BS. There is no known plausible mechanism for this - radio waves from phones are much longer wavelength and much lower power than the infrared radiation emitted by everything at room temperature. The study itself is paywalled, but from the abstract it appears to be small, based on a survey rather than a randomized trial, and doesn't mention controlling for obvious confounders like socioeconomic status.
Beware The Man Of One Study: http://slatestarcodex.com/2014/12/12/beware-the-man-of-one-s...