Not really being an ass it's just not true. Sorry if I came off as one. You were probably standing within range of the car still.
http://urbanlegends.about.com/librar...nlock_door.htm
Pradeep Khosla, dean of Engineering and the CERT center at CMU.-
Khosla said," The remote on a car door works on a radio frequency. If somebody from other side clicks on the remote, what the cell phone will transmit is an audio frequency. The car will not recognize it. It's the wrong frequency."
If it really works for you I guess the more power to you. I know I don't have a cell phone that can take in a radio signal as sound then transfer it back out as radio. That would be a miracle!