If you do not wish to receive unsolicited calls from telemarketers on your BlackBerry, you can register your mobile number with the
FCC's Do-Not-Call Registry. Registration is free and lasts for five years. At the end of the five years, you can sign up for another five, if you wish.
And should you for some reason want to re-enter the world of unsolicited phone calls from people who want to sell you things, you can remove your number from the list at any time. While the Do-Not-Call Registry applies to all telemarketers, it does not cover certain other types of callers who may want to solicit you.
Calls by or on behalf of tax-exempt non-profit organizations, for instance, are still allowed, as are calls from organizations with which you have established a business relationship, calls for which you have given prior written permission, and calls which are not commercial or do not include unsolicited advertisements.