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

Don't worry about downloading apps -- your iPhone already has several tools to block all those annoying calls and texts from random numbers.

How to block and unblock numbers from the Samsung Contacts app Samsung’s Contacts app is the simplest way to block (and unblock) phone numbers using your Samsung handset.

How to block a phone number using Google Messages Google Messages, titled Messages on your phone, is the default texting app that's preinstalled on most Android devices.

Block phone number on iPhone Blocking a phone number on an iPhone can be a useful feature if you want to avoid unwanted calls, messages, or FaceTime requests from specific contacts.

There are several steps you can take to block a number on a landline phone and reduce the amount of spam calls you receive.

5 On Your Side Block these 12 phone numbers linked to text and call scams Cell phones are being bombarded with scam texts. Even just clicking on a malicious link can compromise your personal ...

More commonly, Instagram opts to block devices via IP address. In either case, you won’t be able to get an SMS code. You can try switching to another phone number, if you have one.