This number called many times (12-15). They pretended to be OPTUS and asked for personal information. They are probably part of an identity theft ring.

Not so much a comment about this number, but telemarketers in general.
If they are not from this country and you don't want them to call back, don't simply hang up or put your number on the do not call register, be EXTREMELY racist. It works for me.
Personally, I don't care where someone is from or what they believe, but I use racism ALL THE TIME to upset these mongrels.
Only problem is, I enjoy doing it, but they don't call back, so I gotta wait for a new call centre to open up to do a new round.

I have been getting calls from this no. but told them that it's the wrong name & number, so we will see if I get them again. it's now the 5th day in a row.

who are these people? ive had 5 missed calls from them and they leave a voicemail but with nothing said and when i ring back its an automated message

Have received many, many calls from (02) 8019 9700.
Left several recored messages, saying they were from ICT Group.
Asking to look them up on the net.
Did that to have a look at what it was about.
But very confused with it all.
How many ICT Groups and descriptions to search for.!!!
Guess, I was nearly sucked in by a scam of some sort.
I really appreciate the generosity of people making comments in this section.
Its easy to see how people become hoodwinked, LIKE ME!!
Or nearly did.
Thank you, fellow Aussies!!

Got a phone call today from a guy claiming he was from Optus. i got suspicious when he asked for my mobile number. You'd think they would know my number if he just called it.
anyway, he was selling me some internet package deal for my mobile.

And i tryed texting the number and they say it not allowed

(02) 8198 3820 calls often, no one speaks when I pick up. Often it doesn't ring long enough to be answered in time.

Same number (02) 8198 3820.  A man speaking fluent English (with heavy South Asian accent) claimed he called from Optus telling about Turbo Cap PLUS plan (f***ing he knew that I used Optus Turbo Cap).  He got my name and started asking my date of birth, i refused, then he asked about address, and i didnt give him anything.  I told him i would go into store, not on the phone, then he told me go to optus website to find out more info.   5 minutes later, I called SA Watch police number and been told that there are a lot of scam going on near this holiday break.  NEVER give info on the phone, walk-in store is safer.  At this point, I would say that GOOD BYE Optus, how a hell you handle my privacy.  Thanks for reading here, it is SCAM for sure.

this number calls me once a day at least so annoying apparently optus passed my number on not impressed when i answer they put me on hold