When I switched over to ATT the calls all a sudden starting coming in, I added myself to the do not call list and I havent gotten any more since. So i dont know why you are getting calls because for me it worked. Also, wasnt telemarketing banned like in 2005 and made illegal to call without your consent?? It pisses me off that ATT would sell my number to those telemarketers..When I was with tmobile that never happened.