Answered and no one spoke, then disconnected after 20secs. Called back and says disconnected

I missed this call. When I returned it the voice message stated it was disconnected.

when i answered they hung up!

Potential fraud flagged in Android

Got two calls from the same guy today. Something about wanting to see if I qualify for tax breaks of some kind that are only available to people under 58. Very pushy and aggressive. When I said I he had already called me this morning and I wasn’t interested he got aggressive and asked if I even knew what it was he was calling about. Had to hang up in the end.

I missed this call because I was driving. When I rang the number I heard a recorded voice saying the number was not connected.

Caller: Android warning of potential fraud?

No message left.

My mobile brought it up asa potential fraud/scam.