Rang but never left a message. I don’t numbers that I dont know back, especially if they don’t leave a message

Caller: (02) 9129 6705

Left no message appears dodgy.

Rang but left no message. I don’t call back if no message left.

Rang and left message. Called back and didn't respond - potential scam caller.

Caller: 'Visa Mastercard security dept'

Scam call, appeared to be from an overseas call center

Called me about a Telstra account in my name, despite me not being with Telstra. Knew my full name and email address which was a bit creepy. They wanted to see if I wanted to be removed from their list

Caller asked if I was Mr XX in English then proceeded to switch to speaking in Mandarin for the entire chat, he claimed I used a service via Vodafone (extremely unclear regarding what service I was using when I asked about it). Tried to confirm a number that I know nothing about. When I said I don't know what he was talking about, he asked me why someone else would use my information. He proceeded to hang up when I asked him to provide me information regarding my full name, not before talking in a tone that I found to be unprofessional. Scam most likely.

Claimed to be Telstra, wanted me to confirm my details to remove my details.
I don't have a Telstra account

Caller: They say Telstra

They tried to say they are going to give me a 50% discount with Telstra by hacking in my outlook! I even spoke to 2 different ppl they are a big company with a lot of hackers

my phone automatically called it 'spam' so I did not answer it

Didn’t leave a message. Blocked.

Called saying they were from the security department of Mastercard. Beeped for call from overseas after calling from Sydney number, asian sounding voice

Wanted to discuss Visa card and Mastercard. I hung up on her as it sounded like a scam