Block non-contact callers 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.
One way that I know how to do this is though Android's Do Not Disturb feature.
You basically keep your phone in &quot;do not disturb&quot; 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.