Most everyone registered their home numbers on State or Federal "Do Not Call" lists, but telemarketers will soon be receiving cell phone number lists. Unless you have a plan with free incoming calls, not only will you be subjected to this annoyance...but you will be expected to PAY for it! (This really pisses me off --if my mobile rings, I assume it's something important).
Make sure that your mobile number is on the National "Do Not Call Registry". You can enter your number two ways. You can call 1-888-382-1222 or you can enter it into THIS WEB SITE and this will keep the vultures at bay for five years. (It takes 31 days for your number to get into the registry).
Federal Trade Commission (FTC)'s Do Not Call registry's Frequently Asked Questions