How do you deal with phone scams?

Question

A number of my close friends and relatives have fallen victim to phone scams. Either they received a scam call or reached out to a fake number listed on Google. What are some ways to avoid such scams? It'd be very helpful if you could share your experience and approaches you have explored to block/detect fake numbers.

Porthos9K · Accepted Answer

I use the "Blacklist Blocker" app for Android, which is available via F-Droid[1]. I have a very short whitelist of numbers from which I am willing to accept calls or texts, and everything else goes straight to /dev/null.[1] https://f-droid.org/en/packages/com.kaliturin.blacklist/