Locked your keys in your car? Try this

If you lock your keys in the car and the spare keys are at home, call
someone on your cell phone.

Hold your cell phone about a foot from your car door and have the other
person at your home press the unlock button of your key fob (clicker),
holding it near the phone on their end. Your car doors will unlock. Saves
someone from having to drive your keys to you.

Distance is no object. . You could be hundreds of miles away, and if you
can reach someone who has the other "remote" for your car, you can unlock
the doors (or the trunk!).

Editor's Note * It works fine! We tried it out, and it unlocked our car
over a cell phone!)