No effect on airplane???
Anyone to tell me mobiles don't cause problems inflight would have a hard time to convince me:
A few years ago overhead a russian city suddenly my A320 PF showed something never experienced before and after again: "rhytmic" switching of the PFD side stick order indication on and off (first time ever i saw this in cruise).
This not being enough, ECAM caution "EIU failure" came on, resulting in "reverser isolation valve fault". I suspected EMI and immediately grabbed for the PA microphone, commanding ALL passenger electric appliances being switched off.
And guess what? Ten seconds later all systems back to normal...