How to block unknown (private, withheld, restricted) numbers on Android

As you might know, nearly a half of all incoming calls are spam nowadays. Telemarketers use various tricks to get to you: sometimes they change the phone number to a local one, another time they try to hide the number to make you curious and answer. The only goal, as a rule, is to sell you some product or service.

Here is our step-by-step guide on how to block annoying calls from unknown (withheld, restricted, private) phone numbers on Android. We will show how to do this on various devices running different versions of Google’s OS. The guide will be helpful to get rid of annoying spam calls from unknown callers.

Unfortunately, not all phone models are capable of blocking the calls from restricted numbers out of the box. It’s quite a nonsense when you can add a certain number to your black list but can’t do that for private numbers. So, in some cases you will have to install a third-party call manager to do that.

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