Telstra customers across the country are struggling to make and receive calls using the company's 4G network.
It's not yet known how many customers have been left unable to use their phones and to what extent, after Telstra's 4G network began experiencing technical difficulties a short time ago.
On Twitter the telecommunications company assured customers it was working to fix the issue as quickly as possible.
@Telstra 3 mobiles in our office can’t call. Network????— Lucy Cook (@lucyamaze) May 1, 2018
@telstra is there a current outage for mobiles in Sydney? We have some users who are getting server unavailable when dialling out#TelstraOutage— Amy Miliauskas (@amymiliauskas) May 1, 2018
Customers were also assured calls over the 3G network were not impacted.
We’re working to fix an issue impacting some 4G voice calls. Calls over 3G are unaffected.— Telstra (@Telstra) May 1, 2018
Texts and web access appear to be unaffected by the issue.
It's bad timing for the company, with it recently announcing the launch of its first unlimited data smartphone plan.