I answered with hello, they hang up so I blocked them - simples.

Scam call NBN

Had a missed call and later an SMS saying that no message had been left. Call and SMS came through to a number assigned to my tablet, recently ported to Woolworths Mobile from Telstra. No call received on my mobile phone. Can only conclude that the number assigned to my tablet came up on a random generator outgoing call system, as this number would not be known to a wide audience. Just another nuisance call from a hawker/canvasser is all I can conclude.

Said his name was Martin and called from visa/Mastercard - wanted to know if I wanted authorise a payment of $400+

A robo call saying they were from NBN