Attempt was made to outlaw cell phones  and to stop text messages while driving auto's, so far to my knowledge this law did not pass..
"Locater", All cell phones have a locater that can be set on E911 or Location on. The E911 to be active, you must be able to dial out to be located..
The best and recommended  is to have the locator to be set on Location on,that way if something happens to you , the authorities would be able to  trace your location. I understand there is no higher battery usage from having it on all the time.  This would actually be safer for you.
I could not find it on my phone, so I went to  the cell phone store and they said my locator was automatically on, you should have your checked.
     Other things you probably don,t know about.
I received the following information through the mail, you would have to check it out.

First - 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, the number 112 can also be dialed even if the keypad is locked.
2nd. - Does your car have a remote keyless entry? If you lock your keys in the car and the spare keys are at home,call someone at home on their mobile 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.
3rd. - Hidden Battery Power -  Imagine your mobile battery is very low. To activate, press the keys *3370#  Your mobile will restart with this reserve and the instrument will show 50% increase in battery. This reserve will get charged when you charge your mobile next time.
4th. - How to disable a STOLEN mobile phone?  To check your Mobile phone's serial number, key in the following digits on your phone! e:*#06#
a 15 digit code will appear, write it down and keep it somewhere safe. If your phone is 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 would be useless. You probably will not get your phone back, but at least you know thry cannot use it.

 Have your phone's blocked from receiving certain calls.
On January 28,2008, all cell phone numbers are being released to telemarketing companies and you will start to receive sales calls.  You will be charged for these calls.
To prevent this, call the following number from the phone you wish to have these calls blocked  888 - 382 - 1222.  I understand it takes about 31 days for it to become active. It is the National DO NOT CALL LIST.  I did this on my cell and also my house phone .  If you continue to receive these calls after about a month, contact DO NOT CALL .Gov
                  UPDATE
In the July 16,2008 edition of the sunpapers Two companies have been cited for ignoring the Do Not Call list, Planet Earth Satellite Inc. and its President have been charged with calling consumers whose numbers are on the list, and also Star Satellite LLC based in Provo Utah was accused of making telemarketing calls that failed to  connect consumers to a live telemarketer within two seconds after consumers answer the call.
They were fined a total of $95,000 for ignoring the federal do not call list.

Check the July 24,2008 edition of the sunpaper  page 2A, concerning the use of cell phones.  Cell phone use may increase the risk of brain cancer and tumors.
Cell phones emit a small amount of electromagnetic radiation. It also recommends for children to use the cell phone only for emergency  because their brain is still developing and their skulls are thinner. More studies are being made on this.
          It will be up to you to follow up dates on this in your newspapers.