Get calls all the time.. this number(03) 9764 1690 didn't say what telco he was supposedly with just that my NBN was going to be updated with fibre optic... when I answered the call there was a delay and what sounded like a call centre in the background...I told him not interested and hung up... I called my local TELSTRA shop and the young lady told me it was a fraudulent call and to just say I'm dealing with another company and to just hang...I am so sick of these scammers..almost every day we get calls on our landline...drive you crazy...they need to get a real job instead of trying to rip people off.