Looks like Optus are throwing the 3G model of the Samsung Galaxy S III out and replacing it with the newer, better 4G version. We were able to view internal documents stating the demise of the 3G model — telling stores that current stock can be sold, but there’s no more to be ordered from Optus’ warehouses, instead they should swap a customer’s order to the 4G model.
“Please be advised that Samsung Galaxy S III 3G is no longer available to order from the warehouse.” – Optus
The Galaxy S III 4G will be shipped to stores after September 18th when pre-orders are fulfilled. So be sure to ask your local store about availability of either device depending on what you’re after — we don’t know why you’d want the 3G version, though.