Australia’s largest operator Telstra suffered another network outage this morning, with prepaid customers complaining on social media they couldn’t make calls or access the internet.

The operator’s Twitter account said a network issue occurred earlier in the morning, before telling customers at around 10 am that “some prepaid mobile and Boost customers may have trouble making voice calls, recharging credit and accessing the internet”.

Telstra issued a statement to Fairfax Media saying voice and data services had been restored, but that remaining issues impacting customers’ ability to top up credit were being worked on, the Sydney Morning Herald reported.

In early February the operator confirmed that its 3G and 4G networks experienced outages nationwide for at least three to four hours, affecting about 1.5 million of its 16.7 million mobile customers. It said the problem was caused by human error and offered to compensate users with free data for a day. Its customers were unable to make and receive calls or access data. Telstra’s main support number and its retail channel support also were unavailable.

Kate McKenzie, Telstra Operations COO, issued a statement on its website on February 9 saying: “We experienced an outage on our mobile network that impacted voice and data services for some of our customers. I wanted to let you know what occurred, what we did to fix it and what we’re doing for our customers as a result.”