Jul 7, 2012
I have comcast for my home phone service and can log onto my account and under the preferences tab select call screening. I can then block up to 12 numbers and any private or unknown number by clicking that box. My cell phone is Sprint and I can do the same on my account and block up to 99 numbers for calls or text messages.
While it does not stop the telemarketers, it will prevent them from calling your number any longer, when they call they get a message that states this caller is not accepting calls at this time, and your phone never rings from them again. Try it.