I called back number (03) 9088 9812 rang once then gets disconnected automatically.

Someone with Indian accent trying to advise me (on my mobile/business phone) that I would be receiving a free wireless modem and half price calls on my home phone - then asking if the Internet is via ADSL or NBN. Did not recognise the name of their business even when I asked (possibly Optus Advantage, Office Advantage or similar). They had my name - but did not give up gracefully when I tried to end the call.

calls and hands up