For those in the U.S. who might find it of interest, I received this in email and followed the instructions. It's quick and easy.
Dear Friends and Family,
I have been alerted to the fact that cell phones go public this month and hence will be released to telemarketing companies. You will start to receive sales calls for which you will be charged.
To prevent this, call the following number from your cell phone: 888-382-1222.
It is the National DO NOT CALL list. It will only take a minute of your time. It blocks your number for five (5) years. You must call from the cell phone number you want to have blocked. You cannot call from a different phone number.
HELP OTHERS BY PASSING THIS ON TO ALL YOUR FRIENDS.. It takes about 20 seconds.
This is also the same number that you can register your land line on to stop most sales calls coming to that number as well.

