You can find the answers by doing a google search. 35 of the 37 calls on Flight 93 were made on Airfones located on the back of the seats. Cell phones can also make calls from airplanes.
WTC-7 had uncontrolled fires ignited by debris from collapse of the North Tower which weakened its structure and caused the collapse.
You will have to search for answers to the other 4998 inconsistencies.
Get real matt!!