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

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.

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 ...

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.

Block Your Cellphone Number From Caller ID People know it is you calling when your caller ID pops up on their phone, but it does not have to be like that. There are two ways to keep your identity ...

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

You willingly gave your phone number to a company, and now that company is sending you ads. But spam also comes from unknown numbers, advertising fake products and offers.

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 ...