Users of National Australia Bank were left without mobile banking access on 31 May after an IT system crashed around midday . Just before 5pm, customers could still not log on using the bank's mobile app. As angry users took to social media to vent their frustrations , a NAB spokesperson apologized for the inconvenience , and urged customers to use a desktop or an iPad to access web - based banking services . The bank 's in - branch and telephone banking services were unaffected by the outage .
Users of National Australia Bank were left without mobile banking access on 31 May after an IT system crashed around midday . As angry users took to social media to vent their frustrations , a NAB spokesperson apologized for the inconvenience , and urged customers to use a desktop or an iPad to access web - based banking services . The bank 's in - branch and telephone banking services were unaffected by the outage .