Nothing then recorded 'Goodbye'.

Caller: some clown with indian accent

Said he was from telstra, asked me if I was the owner and then went on to ask me what range my phone bill was in . Go figure , one would think Telstra would have this info?
He said my nbn would be slowed down by approx 30% ,I asked him to get to the point as he rambled on , I got the sh*ts and hung up.

Called our business multiple times and when we answered they would hang up. Finally after many calls to us someone said is they are from Telstra and reducing our Telstra bill due to NBN in the area (we are not with Telstra) and asked for personal details... hung up scammers!!!!

Rings me every day and says nothing. Tried to call back and just got an engaged signal. My phone says 'temporary failure'. Clearly dodgy.

Caller: Nobel Telecom

claims to be in Melbourne but calling from a Perth no. and obviously a dialler.. Asian accent call me sometimes twice a day and hangup as soon as I challenge them in any way

No Message but I suspect a scam, as this number was calling regularly but never leaving a message, except "goodbye" when I rang back.

Obviously a scam call

It just hangs up after one ring. It's tried practically every number on our switch.

Just rings you and hangs up very annoying

I rang once and got disconnected