Five Things I Didn't Know I Could Do With My Cellphone

Via Kisses & Roses: http://kissesandroses.blogspot.com/2008/01/5-things-you-did-not-know-your-phone.html

There are a few things that can be done in times of grave emergencies. Your mobile phone can actually be a life saver or an emergency tool for survival. 
Checkout the things that you can do with it. 

FIRST
Subject: Emergency

The Emergency Number worldwide for Mobile is 112.  If you find yourself out of the coverage area of yourmobile network and there is an emergency, dial 112 and the mobile will search any existing network to establish the emergency number for you, and interestingly this number, 112, can be dialed even if the keypad is locked. Try it out.

SECOND
Subject: Have you locked your keys in the car lately?

Does your car have remote keyless entry? 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 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 home press the unlock button, holding it near their cell 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 that 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 the cell phone. 

THIRD
Subject: Hidden Battery Power

Imagine your cell phone battery is very low. To activate, press the keys Star 3370 pound (*3370#).  Your cell phone will restart with this reserve power and the instrument will show a 50% increase in battery power. This reserve will get recharged when you charge your cell phone next time.

FOURTH
Subject: How to disable a stolen mobile phone

To check your mobile phone's serial number, key in the following digits on your phone: Star pound 06 pound(*#06#). A 15 digit code will appear on the screen.This number is unique to your handset.  Write the number down and keep it somewhere safe. When your phone gets stolen, you can phone your service 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 or sell it either. If everybody does this, there would be no point in people stealing mobile phones.  

FIFTH
Subject: Information calls (for those of you in the US)

Cell phone companies are charging us $1.00 to $1.75 or more for 411 information calls when they don't have to. Most of us do not carry a telephone directory around in our pocket or vehicle, which makes this situation even more of a problem. When you need to use the 411 information option, simply dial (800) FREE 411 , or 800-373-3411 without incuring any charge at all. 
Program this into your cellphone now.