I just received this from a friend and wanted to share it with you.
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. Check out the things that you can do with it: 
FIRST
Emergency
The Emergency Number worldwide for Mobile is 112. If you find yourself
out of t he 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, and interestingly this number 112
can be dialed even if the keypad is locked. Try it out.
SECOND
Have you locked your keys in the car? 
Does your car have remote key-less 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 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" 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!"
THIRD
Hidden Battery Power
Imagine your cell battery is very low. To activate, press the keys *3370#
Your cell will restart with this reserve and the instrument will show a
50% increase in battery. This reserve will get charged when you charge
your cell next time.
FOURTH
How to disable a STOLEN mobile phone?
To check your Mobile phone's serial number, key in the following digits on
your phone: * # 0 6 # A 15 digit code will appear on the screen. This
number is unique to your handset. Write it down and keep it somewhere
safe. When your phone get 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/sell it either. If everybody does
this, there would be no point in people stealing mobile phones.
And Finally....
FIFTH
Free Directory Service for Cells 
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 in our 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 incurring any charge at
all. Program this into your cell phone now.
This is the kind of information people don't mind receiving, so pass it
on to your family and friends.
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