Not really. The unsheilded nav system and other electronic avionics sensors have automatic overides on some aspects of the control system, for example when the aircraft is on auto pilot tied in with the navigational control system, as is often the case during mid flight time. Interference with the nav system by cell phones in the 800 Mghtz range could skew the A/C controls by failing to completely disengage when prompted, making the A/C difficult to fly with the auto pilot failing to shut off completely.
I know it is speculation but not outside the realm of possibility. I look forward to reading the incident report.
Um, not quite. A 757 is quite primitive in terms of what the onboard avionics can or can’t do.