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I was wondering if there was a way to block all non-contact callers on my Samsung Galaxy A20 operating system Android 10. I have been through the settings and the only option I have is block contacts or block unknown callers I'm not sure if that just means private calls or non-contact collars. I'm unable to find a solution on YouTube so I'm hoping somebody on here can help.

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One way that I know how to do this is though Android's Do Not Disturb feature.

You basically keep your phone in "do not disturb" mode always, then manually set who is allowed to interrupt you.

Some of the options for who can interrupt you are:

  • Conversations:

    • All conversations
    • Priority conversations. To choose which conversations are priority conversations, tap Settings.
    • None
  • Calls:

    • Anyone, contacts or starred contacts
    • Repeat callers. To let a call through if the same person calls twice in 15 minutes, turn on Allow repeat callers.
  • Messages:

    • Anyone, contacts or starred contacts
    • None
    • Reminders
    • Events

Basically, this is essentially a white-list approach as opposed to a black-list approach.

There may be third-party apps that can accomplish what you are asking, but the above is a stock built-in to Android option for you.

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I use an Android app called Calls Blacklist. Settings - Blocking - Unknown Numbers (Block all numbers except Contacts)

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  • Hello. Can you provide link for this app? – Firelord Sep 19 at 0:28

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