[304065]

I'm guessing, because the report doesn't give the aircraft type, only says it's a "Regional Jet," that it was something like an Embraer "Jungle Jet" that has an EFIS presentation for the Altitude and Airspeed.

Obviously a cell phone can't affect a direct-reading pitot-static system, not even if you shoved the antenna in the static port- that's why there's an alternate static port.

GPS has a local oscillator too, I would expect, just like any radio receiver. A moot point, because in order for it to work you need satellite coverage which you ain't gettin' from putting the antenna up to the plastic window.