Optus is being rather vague about exactly which plans attract a free Apple Music trial, but as far as one can tell from its website, a six-month trial comes with the $30 and $40 per month SIM-only plans and the $45 and $65 "with a phone" plan (NB, the latter prices exclude handset repayments).
The $50 a month SIM only plan and the $85, $105 and $125 (though currently $106.25) "with a phone" plans include a 12-month trial.
The SIM only plans involve a 12-month contract, while the others involve a 24-month commitment.
"We are excited to offer Apple Music to Optus customers and help more Australians connect and share the joys of streaming music on our amazing network," said Optus vice-president of TV, content and product development, Clive Dickens.
"With this new exclusive offer, we are aiming to introduce more Australians to the ease and convenience of finding a classic favourite or discovering brand new songs and artists with Apple Music, whether in the car, at home or at work."