I have no concerns about cell phone radiation but I'd just like to point out that the high carrier frequencies don't necessarily preclude effects on low frequency systems. The modulation envelope probably extends down quite close to DC (think about the modulation induced by a cell phone adapting its emission to towers) and virtually any non-linear circuit can act as a rectifier/detector. I used to work in an accelerator physics lab and the low frequency effects of RF leaks could be interesting.