By Ry Crozier on Feb 17, 2021 10:54AM Aussie Broadband's Phillip Britt. Will offer 4G failover for NBN, also potentially cellular fixed wireless. Aussie Broadband is set to revamp its mobile services and expand into offering cellular fixed wireless after switching its mobile virtual network operator (MVNO) allegiance from Telstra to Optus. The company announced the change as part of its half-year results, saying it had signed a new MVNO agreement with Optus Wholesale in December last year. In an accompanying slide deck, Aussie Broadband said the Optus agreement “will replace [the] existing MVNO agreement for access to the Telstra network”. Aussie Broadband said it plans to move its existing 19,000 mobile customers off the Telstra network and onto Optus.