I don't know if anybody knows this but I just learned a new cool trick you can do with your cell phone.
If your car has remote keyless entry and you're guilty of constantly locking your keys in your car this may come in handy. If you lock your keys in your car (but have a spare set at home with an extra remote) you can call somebody at home on their cell phone from your cell phone. The you hold your cell phone about a foot or so from the vehicle door and have the person at the other end press the unlock button while holding the remote near their cell phone. Your call will unlock as the signal will travel from their phone to yours.
Apparantley it doesn't matter how far away you are as long as you get decent service and the other person is also on a cell phone. Think of the time and fuel you will save next time you lock your keys in your car.
Everybody I've talked to about this says it has worked for them, but I suggest you test it first before you go about locking your keys in your car 300 miles from home.
I hope you've enjoyed this guide, if you did please remember to vote.
Randall, of Randalls-eBooks
P.S. This method also works on the trunk!