Free Applications for Android, BlackBerry, iOS and Windows block unwanted calls

Robocalls, or unsolicited prerecorded calls, and SPAM text messages from businesses and other organizations aren’t only annoying, but illegal under federal law if sent to your mobile device without your consent.

CTIA, the telecommunications industry trade group, assembled a list of applications for AndroidBlackBerry, iOS, and Windows operating systems that can block unwanted calls, as well as step-by-step instructions on how to block individual numbers based on these operating systems.