Telstra is scrambling to restore a national outage that has left some bank customers unable to use eftpos or ATMs.
ANZ customers in New South Wales, Victoria and Tasmania are among those affected.
The fault emerged Friday morning and Telstra has said the cause is unclear.
The outage also affected taxi services at one stage, but that issue has since been resolved.
A Telstra spokesman said the company was working to restore services.
"We have seen some improvement on the issue impacting some machine-to-machine data services, including eftpos and ATMs, however we are still working on full restoration," the spokesman said.
"The issue has our highest priority and we apologise for the impact it is having on customers."
Customers took to social media to vent their frustrations at the outages.
