I called back number (02) 9015 3802 reached IVR for Vodafone.

Didn't answer -- check here for who it was, saw it was Vodaphone and already got an email and a text message. Vodaphone being a pain trying to flog Google Pixel 3 and 3XL

Caller: Vodafone

To anyone who has received a call from this number (02) 9015 3802, it's listed in Vodafone's website of numbers they use to call along with many others. They do not leave a message and you end up thinking it's a scam so block it. Forget contacting their call centre about it, just go to their website and provide feedback or in my case a complaint. Vodafone's customer service is terrible at the best of times but it seems their teams are getting worse. Once you lodge the complaint you can ask them to remove you from any these nuisance calls. Good luck!

Caller: (02) 9015 3802

Definitely Vodafone. I contacted them confirmed it was their number and sent me this link with their authorised numbers. However, they should train their cold-callers if they are going to ask for people's PIN number, that really makes them sound dodgy.
https://www.vodafone.com.au/support/contact/customer-care

Picked up but no one answered

Caller: They claimed they were from Vodafone

They called saying they were from Vodafone and then wanted me to provide my Pin straightforward. They claim there was a new offer for me, but need to verify my account. I said I wanted to reset it, then they ignore my request and asked me to take a guess. Definitely Suspect! Could be a Caller ID spoofing case.

Caller: Vodafone

It's Vodafone with terribly executed, unsolicited sales. If you can understand what they are trying to say,

Caller: Vodafone

I didn't answer but called back. Its VODAFONE with an exciting new offer to existing customers which I am so no worries.

Seems like a scam

Not for this number, but you can ask them for proof that they are Vodafone and they will send you an SMS with some links and some validation.

Confirmed scam number - dude on the phone tried to tell me he’s calling for Vodafone (Chinese department) and that someone has registered a new number under my name and was sending scam messaged. I had to provide my PIN number and details to cancel the number.

Obviously figured it was a scam.

I called up Vodafone to confirm and they said they never tried to call me.

Missed call. My samsung phone marked it as potential fraud. No message left.

Caller: Vodafone

Not spam, fraud, or any of that.
This is Vodafone, calling their customers with offers to save money. If you don't want them to call you, you can opt out, no need to post a fake report about it.
The number is on their website https://www.vodafone.com.au/support/notify/customer-care

Scam caller

Caller: She says shes from Vodafone

She kept insisting asking Me what my name she is from Vodafone wants to make new tablets iphone contracts

Its Vodafone offering new deals

I tried to call back and it said this number was disconnected. Definitely dodgy.

Caller: Vodafone

As Martin said, definitely Vodafone. Their call centres are in India so I avoid dealing with them on the phone, accents are too strong and they read their scripts too quickly. I don't give out my PIN, if it's urgent they will email me or text

I have had multiple calls from this number that dont speak when i pick up. my daughter had one from it as well (she is on my plan) and they asked for me and my pin straight away. hung up on them and blocked the number. definately suspect.

They keep calling me, never leave a message and the one time I did call back out of curiosity, they picked up but didn't say anything.