ACMA declined to comment.

Optus is currently also embroiled in an ongoing legal fight to prevent a report into the data breach from being released publicly, as part of a class action lawsuit from Slater and Gordon.

The telco posted its half-year financial results on Thursday, with operating revenue down 1.1 per cent year-on-year amid lower revenues for its enterprise unit, though mobile service revenues climbed higher. The company added 116,000 mobile customers for the full-year ending March 31, 2024, primarily from its low-cost Amaysim brand.

Operating revenue was flat over the 12 months to March 31 at $8 billion, with operating expenses also flat at $6 billion.

“Optus is working hard to rebuild the trust of customers after a challenging 18 months and these results demonstrate we are on the right track,” Optus interim chief executive Michael Venter said.

“We’re listening to our customers and in the year ahead we’ll be continuing to prioritise what we know is important to them – a resilient network that delivers seamless connectivity, great value products and services, and simple, efficient customer service.”

Parent company Singtel has also flagged a strategy refresh for Optus’ enterprise unit, which has faced pressures from macroeconomic headwinds, increased competition and structural declines as large business customers increasingly move away from fixed voice products and switch to cheaper cloud-based options from the likes of Microsoft.

It said it will streamline its product catalogue from more than 250 to fewer than 100 products, slash its vendor portfolio from more than 100 to 16 partners, and “exit unprofitable businesses”. Optus employs about 7500 people nationally.

“Essentially what’s happening is that the way customers are using enterprise products has shifted,” Venter said. “I don’t know about you, but I don’t have a fixed-line phone on my desk, and I haven’t for a long time. That was a high-margin business and it’s just a structural shift that’s occurred that means those margins are no longer what they were.”

Telstra this week cited its underperforming enterprise unit as a key driver behind a decision to cut up to 2800 jobs, with 9 per cent of its workforce to depart the company this calendar year.

Venter added that Optus had reduced its overall head count by about 10 per cent over the past year amid the falling enterprise revenue, alongside damage from the data breach and subsequent outage.

“It’s been a difficult 18 months for Optus but the business is bouncing back and we’re seeing green shoots. We understand that regaining customer trust takes time, it will be brick by brick and step by step.”

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