I tried most of these and they totally work... Pretty cool! They won't always work, depending on your cell phone provider and your car...
The Emergency Number worldwide for Mobile is 112. If you find yourself out of the coverage area of your mobile network and there is an emergency, dial 112 and the mobile will search any existing network to establish the emergency number for you. You can even dial 112 if your keypad is locked!
SECOND: Have you locked your keys in your car?
Does your car have remote keyless entry? If you lock your keys in the car and the spare keys are at home, call someone at home on their cell phone from your cell phone. Hold your cell phone about a foot from your car door and have the person at your home press the unlock button, holding it near the mobile 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" to your car, you can unlock the doors!
THIRD: Hidden Battery Power
If your cell battery is very low, press the keys *3370# and your phone will restart with 50% increase in the battery. The reserve recharges every time you recharge your battery.
FOURTH: Disable a Stolen Phone
To check your mobile phone's serial number, key in *#06# and a 15-digit code will appear on the screen. This number is unique to your handset. Write it down and in the event that your phone is stolen, call your mobile provider and give them this code. They will then be able to block your handset so even if the thief changes the sim card, your phone will be totally useless. You probably won't get your phone back, but at least you know that whoever stole it can't use/sell it either.
FIFTH: Free Directory Service for Cells
Cell phone companies are charging a ridiculous amount for 411 information calls. Use (800)FREE411 / (800)373-3411 or (800)GOOG411 / (800)466-4411 without incurring any 411 charges.
4 hours ago