Are single-photon models even useful here? What about aggregate photon effects? The sheer amount of photons hitting you from a cell-tower is enormous. Perhaps an "optical tweezer" type effect could happen?
And for the non-thermal effect discussion, have you considered voltage-gated ion-channels in cell-membranes?
And for the non-thermal effect discussion, have you considered voltage-gated ion-channels in cell-membranes?