Call Contol Pro is a premium call blocking application for the BlackBerry that normally cost $7.99, but, for a limited time, is being offered free in BlackBerry App World for BlackBerry users willing to leave a review.

All you have to do to get your free copy of Call Control Pro is:

1. Download Call Control Lite for free from Blackberry App World.
2. Install Call Control and have fun blocking unwanted callers.
3. Leave a review on App World about your experience with Call Control.
4. Email a copy of your review to and after verification, you’ll receive a free Pro license key via email.

[Via BlackBerry Cool]