Should be illegal, considering you have to PAY for incoming calls..

From a forwarded e-mail my family received from my techie brother-in-law:

In a few weeks, cell phone numbers are being released to telemarketing companies and you will start to receive sales calls on cell phones. Go to this link to put your cell number on the national Do Not Call list. It blocks your number for 5 years.

Here is online form

https://www.donotcall.gov/register/reg.aspx