This is from the site I got that quote from, it is somewhat longer and includes this.
The 9/11 Cell Phone Calls
Concluding Remarks
A large part of the description, regarding the 19 hijackers relies on cell phone conversations with family and friends.
While a few of these calls (placed at low altitude) could have got through, the wireless technology was not available. On this issue, expert opinion within the wireless telecom industry is unequivocal.
In other words, at least part of the Commission's script in Chapter 1 on the cell phone conversations, is fabricated.
According to the American Airline / Qualcomm announcement, the technology for cell phone transmission at high altitude will only be available aboard commercial aircraft in 2006. This is an inescapable fact.
In the eyes of public opinion, the cell phone conversations on the Arab hijackers is needed to sustain the illusion that America is under attack.
The "war on terrorism" underlying the National Security doctrine relies on real time "evidence" concerning the Arab hijackers. The latter personify, so to speak, this illusive "outside enemy" (Al Qaeda), which is threatening the homeland.
Embodied into the Commission's "script" of 911, the narrative of what happened on the plane with the Arab hijackers is therefore crucial. It is an integral part of the Administration's disinformation and propaganda program. It constitutes a justification for the anti-terror legislation under the Patriot acts and the waging of America's pre-emptive wars against Afghanistan and Iraq.
The article itself tracks the planes and their altitudes, read it for yourself.
Busted! The 9/11 Calls Weren't Real