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

Google Voice is a Web-based phone service that enables you to connect multiple different phones to a single phone number managed by Google. From Google Voice, you can block a phone number from ...

If your cell phone carrier does not allow you to block your number, there are still a few timeless methods that work for making private calls. One longtime favorite is using *67, and it's ...

Your phone number cannot be blocked while calling toll-free numbers or emergency services. The temporary way of keeping your mobile number invisible from caller ID is as easy as 1, 2, 3.

If your cell phone carrier does not allow you to block your number, there are still a few timeless methods that work for making private calls. One longtime favorite is using *67, and it's ...

If you want to block your cell phone number from showing up on other phones (for whatever reason), you can do it temporarily simply by dialing *67 before the number you're calling. According to ...

The iPhone doesn't actually provide a way to block phone numbers. You can tap "Decline" when the phone rings, but you can't just tap a "Block" button to keep someone from calling anymore.

There are several ways to block a phone number on your iPhone. You can do it within the Settings app, or the Phone, Messages, and FaceTime apps.

You can block a phone number or existing contact on your iPhone from the Phone app or your Contact list.

When you block someone's number on your iPhone, that number can't call, text, or FaceTime you. It won't affect third-party apps like WhatsApp, though.