Here is some information on the Phone calls that were made from Flight 93 and the radio transmissions that were made with ARTC.
PDF 83 F93 Phone Calls and Radio Calls
Here is some more information in regards to any phone calls that were made on 9/11. Some video's seem to prove that no phone calls were ever made from any f the 4 hijacked planes.
But surely at least one of these phone calls are real. What do you think?