Said that the caller was from Optus, scam !

Do not answer this number.
They say they are from Telstra giving you a 30% discount on your bill. It’s a complete scam.

Caller: Someone claiming from telstra

If they ring and say telstra is offering u 30 percent discount for your good credit rating send u one time oun number to your email the sight is genuine telstra site with logo then they will ask for your driver's I'd reported to telstra who confirmed it's a fraudulent to buy iphones in your name. Don't answer their call