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

Tired of getting spammed by the same number? Here are the simple steps to block a phone number on your iPhone.

You can block a number on your Samsung Galaxy phone for specific phone numbers or block all unknown callers at once. Here's how to do each.

Some landline and cellular providers currently offer call blocking tools, but phone subscribers must opt-in to use them. The FCC's rule lets service providers block calls as a default.