Hold your cell phone about a foot from your car door knob and have the person at your home press the unlock button of the remote, holding it near the mobile phone on their end. Your car will be 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).
Well to avoid all this hasle, you only need your mobile phone.
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TechnoratiMobile Tips / Technology