3 useful tips for the users of mobile phone:

[marcro]

1) Emergency number

The Emergency Number worldwide for Mobile is 112.

If you find yourself out of 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
number112 can be dialed even while the keypad is locked.
Try it out.

2) Locked the keys in the car? Your car has remote keys?

This may come in handy someday. Good reason to own a cell phone: If you
happen to 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).


3) Hidden Battery power

Imagine your cell battery is very low, u r expecting an important call and u
don't have a charger. A Nokia phonr comes with a reserve
battery. 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 u charge your cell next time.

[Bongo]

1) Emergency number

The Emergency Number worldwide for Mobile is 112.

If you find yourself out of 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
number112 can be dialed even while the keypad is locked.
Try it out.

But don't actually ring it (for obvious reasons).

[Bongo]

3) Hidden Battery power

Imagine your cell battery is very low, u r expecting an important call and u
don't have a charger. A Nokia phonr comes with a reserve
battery. 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 u charge your cell next time.

Slighty untrue as it actually lowers the quality of the phone to extend battery life:

26. What is EFR and how do I activate it?

EFR stands for Enhanced Full Rate codec and is usually automatically
activated on any phone that supports it. It will give you much better
sound quality when enabled at the expense of battery consumption -
talktime is reduced by about 5%.

To activate it enter *3370# then reboot your phone
To deactivate it enter #3370# then reboot your phone

You can also choose to use Half Rate codec. This enabled will give
you reduced sound quality but give you around 30% more talktime.

To activate it enter *4720# then reboot your phone
To deactivate it enter #4720# then reboot your phone

Note: These codes may not work on all models of Nokia phones.

[b4matt]

things i never new! n1 ty

[LukieD]

2) Locked the keys in the car? Your car has remote keys?

This may come in handy someday. Good reason to own a cell phone: If you
happen to 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).

http://www.snopes.com/autos/techno/keyless.asp

Claim:   Any car equipped with a remote keyless entry system can be unlocked via cell phone.
Status:   False.

[bolt pp]

how do i use my cell phone to phone up and make winning bets with ladbrokes?

[Nem]

3) Hidden Battery power

Imagine your cell battery is very low, u r expecting an important call and u
don't have a charger. A Nokia phonr comes with a reserve
battery. 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 u charge your cell next time.

Slighty untrue as it actually lowers the quality of the phone to extend battery life:

26. What is EFR and how do I activate it?

EFR stands for Enhanced Full Rate codec and is usually automatically
activated on any phone that supports it. It will give you much better
sound quality when enabled at the expense of battery consumption -
talktime is reduced by about 5%.

To activate it enter *3370# then reboot your phone
To deactivate it enter #3370# then reboot your phone

You can also choose to use Half Rate codec. This enabled will give
you reduced sound quality but give you around 30% more talktime.

To activate it enter *4720# then reboot your phone
To deactivate it enter #4720# then reboot your phone

Note: These codes may not work on all models of Nokia phones.

Neither work for my phone.

[Royal Flush]

2) Locked the keys in the car? Your car has remote keys?

This may come in handy someday. Good reason to own a cell phone: If you
happen to 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).

I cant imagine anyone has ever falled for that one, ever.