spam

disconnected number that hangs up after 3 sec - they now know your number is alive and will call again & onsell to others!

Number is disconnected if you call back.
If your answer, they hang up after 3 second.
This is spammers checking for active numbers that answer, later you get bombarded by Tele.
DO NOT ANSWER, BLOCK IMMEDIATELY

Called the number back 1 minute after they rang and got this verbal message
Optus advises that the mobile number you called has been disconnected.
Not a mobile so obviously a telemarketer. suggest this caller be blocked so as not to ruin your weekend

Called me on a Saturday. Didn’t answer.

Telemarketer from a ccvvv ompany called power saver

company called power saver

A none connected number when I called back.

Hung up when I answered.

Has to be a spam because when you call back you get the message that "the number you dialed has been disconnected."