Ihavealight. I meant I haven't looked into which building or plane was supposed to hit where.
Getting cell service in a plane is not hard. How do you think the pilots gets their information? How about the wifi on planes? Or the tv? Or even the phones they have on the airplanes (which very few planes have left after they've been modernized).
I invite you to take a joyride, practice flight in a Cessna sometime and see if you can text and call at 10,000 ft.
So back to the point, with a little training, one can fly VFR on a jumbo jet and crash it into a building or whatever else they choose.