1) Locked the keys in the car? This may come in handy someday. Good reason to own a cell phone: If you lock your keys in the car and the spare keys are 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, holding it near the phone on their end. Your car 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!" 2) Imagine your cell battery is very low, you are expecting an important call and you don't have a charger". Nokia instrument comes with a reserve battery. To activate, key is *3370# Your cell will restart with this reserve and your instrument will show a 50% incerase in battery. This reserve will get charged when you charge your cell next time.