The company said in a statement that this product followed its making 5G home broadband available to its resellers last July.
There are a total of 12 MVNOs who resell Optus postpaid services: 2SG, Acurus, Amaysim Group, Bendigo Telco, BTB, Circles.Life, Commander, Dodo, iPrimus, Moose Mobile, SpinTel, Southern Phone and Vocus.
"We're excited to bring Optus' 5G network to our wholesale partners from today. With superfast speeds, 5G delivers a fantastic experience that opens a whole new world of opportunity for our wholesale partners," said Ben White, Optus managing director, Wholesale, Satellite and Strategy.
Optus said it had more than 900 5G sites switched on and was rolling out in selected areas, with no service as yet in Tasmania or the Northern Territory.
The company added that 5G mobile would be available to select wholesale postpaid partners in line with the Optus 5G rollout and Optus' wholesale contracts, with SpinTel the first wholesale partner to enable 5G.