Optus lost between 250,000 to 300,000 mobile customers in the aftermath of its nationwide outage in November 2023, according to analyst estimates, with Telstra and TPG gaining customer share in the immediate aftermath. Optus chief executive Stephen Rue holds a press conference about the Triple Zero call failures. Credit: Sydney Morning HeraldThe telco’s churn rates – the industry term for departing customers – remained elevated for several months, and executives can probably expect a similar outcome this time round. The company’s mobile market share stands at about 24 per cent, trailing well behind Telstra’s 57 per cent and ahead of TPG’s 13 per cent. Veteran telecommunications analyst Mark Gregory said some Optus customers in the states and territories hardest hit by the latest outage – South Australia, Western Australia and the Northern Territory – were already pledging to abandon the company as soon as their contracts expired.