Airphones were available on planes then, where do you get the idea they weren't?As for the phone calls allegedly made from those planes.
They were flying at altitude, and speed. Back then, I could barely get a signal anywhere off of an interstate. Hitting towers while at their altitude and speed on cell phones is a myth.
Aircraft back then, did not have cell platforms onboard the aircraft like many do today.
Calls could be possible on the plane phones... however not too many people call their mother and say, "Hi, Mom, this is John Smith."
I remember several months, maybe a year, or, so before the attacks, that Hollywood came up with a phenomenal system where they could take could take someones voice, or, a few words of that voice, including dead actors and have them talk in commercials, movies, etc.
The technology was that they could sample John Wayne's voice, and have him say...
"Pardner, in 2012, this election is the most critical one in our nations history. That is why, I am asking you to vote for my favorite buckaroo, Barak Obama. He's a straight shooter, and a member of the A-Team."
Again, not saying that the phone calls were faked, but the technology is there, to do it. Planes back then did not have cell platforms aboard the aircraft, as many do today. Calls could have been made from locations other than the aircraft, but I am not saying that they were, just that it is a possibility.
And the phones required stronger receivers because there were less towers, new phones use weaker receivers because cell tower grids have grown.