Many of the planes had phones attached to the seat in front of you. I remember seeing them on a business trip in year 2000. That phone call from the Shanksville hero Tod Beamer to his wife contained those words, “Let’s roll” —that audio was widely circulated. He had called from the plane as a private citizen.
Sorry, that too is apurposed lie from the handlers. The planes in question did not have the air phones activated. One stewardess supposedly remained on a cedll line with various contacts for more than twenty minutes, supposedly at altitude. Doing a bit of homework can open eyes to something we really don’t want to know because of the implications, so folks just swallow the fabricated lines fed through compliant media.