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

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.

The simplest option on iPhone is to manually block individual numbers. However, spammers use a range of phone numbers, and ...

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

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

How to unblock a number on Galaxy Note10 If you decide to later on unblock a number on your Galaxy Note10, just go back to the place where you add a blocked number. Go to Home or Apps screen.

To block a number on an iPhone or Android, you can use your device's Phone app. To block a number on a landline, contact your service provider or use a call-blocking device.

Manually add a phone number to block Enabling the Block Unknown Numbers option can prevent genuine callers who are not registered in your contacts from reaching you.

It can be necessary to block a number on an iPhone at times, especially when you don't want to receive unwanted calls, messages, or FaceTime requests from certain contacts.

While unwanted phone calls are a part of everyday life, your iPhone offers a few different options for silencing particularly persistent callers. Here's how you can block or silence unwanted calls ...