Kurt "Cyberguy" Knutsson outlines the simple steps to block unknown calls on your Android and iPhone so you can avoid those spam calls.

You can block someone on Viber from the privacy setting of the app on your Android phone. Once a contact has been blocked they won’t be able to send you a message or call you using the app. They ...

You have a whole arsenal of smartphone tools at your disposal: Block numbers, Do Not Disturb mode, and apps can help end this telephonic pestilence.

No matter what type of smartphone you're using, we can help you avoid all of those pesky robo and sales calls. Here's how to block a number on any smartphone.