Guide to emergency Cell Phone tips

Cell phone tips, All of these tips have been confirmed, and are not rumor.

Increase Cell Phone Battery Life
 * There are 3 different audio modes on the Nokia cell phone as well as some others.
 * Half Rate Codec
 * Low sound quality
 * Regular
 * normal sound quality
 * Enhanced Full Rate Codec (EFR)
 * High sound quality
 * Lower sound quality mode will increase your battery life, while higher sound quality mode will decrease your battery life. Using the lowest quality, Half Rate Codec, can give you about 30% more talk time.
 * *#4720#
 * Activate/Deactivate Half Rate Codec
 * *3370#
 * Activates Enhanced Full Rate Codec (EFR)

Disable a STOLEN mobile phone?
 * The most important thing to do before you worry about deactivating your phone is to disable your phone plan.
 * The following steps for disabling steps only work with GSM cell phones
 * Find your cell phone's 15 digit International Mobile Equipment Identity (IMEI Number)
 * Enter: *#06#
 * Write it down somewhere, and keep it in a safe place
 * If it gets stolen give the code to your phone service provider and they can disable it.

Need Phone Number

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.

=References=
 * http://www.snopes.com/inboxer/household/cellphones.asp
 * http://www.programmerworld.net/articles/tips/nokia_codes.php