They send SMS says "NAB Alert - We have detected a potential issue and have blocked your Internet banking." Then they provide a LINK to click to resolve the issue! Although their link looks authentic (nab.com.au) it is TOTAL SCAM. The link will ask for your NAB customer number & password, DON'T BE FOOLED !!!
I asked my branch staff & they confirmed its an EVIL CROOKED GANG OF THIEVES.
When i tried to call them, my Android Smart Security shows this mobile number as "POTENTIAL SCAM".
Please report them to Police and to Telstra or your internet provider. The more complaints they get the more likely they will trace the crooks & get caught. I want them behind bars for a long time!

Caller: As Above

Oh and remember especially if you dont bank with the NAB they do it with all the banks so be careful on any cyber related fraud - they can get you so EASY