I answered the call the caller muttered something unintelligible in a foreign accent and hung up on me straight away.

scammer....

Caller: Unknown

Called to find out if the credit card has suspicious charges. Wanted to know account limit and asked about other account details. I did not give them the details but asked to caller to call back. I called the bank as soon as I hung up and they confirmed the call would have been from a scammer.
Do not pick up a call from this number. Never give out you account details when someone calls.

Silent call, then hangs up on answer. Annoying

Optus...why this spam calls? Going to another service provider with a new number is my option.

Scammer

Scammer do not answer

I received two phone calls from this number. A voice message that was recorded on Friday consisted from a call center general noise - lots of people talking in the background, after that a male voice said "Hello?" and hung up.Second call (after hours (has to be 8.30 pm in Melbourne) did not actually ring as such, but got registered on the phone as a missed call. Whoever they are, their tech level is pretty low. I blocked the number, not a legit caller.

Scammer

Phone my business offering financial services, I asked for my phone number to be removed from list, he responded that it would cost me!. Obviously a scam.

Spam or scam overseas