Samsung is currently testing the dual band TDD/FDD-LTE Galaxy S4 and mini on the Optus network.
The TDD-LTE service is currently available in just Canberra but will be rolled out across Australian metro areas over the next year.
Samsung dual-mode 4G Galaxy S4 will be available from Optus in September, with S4 mini to be announced shortly, it confirmed today.
An Optus spokesperson could not confirm if the dual band S4 will be pricier than existing 4G models, when contacted by CN. It is also not clear how great demand for the telco's TD LTE service is.
Optus 4G TD-LTE network runs on 2300 MHZ, promises faster speeds (tests hits 61Mbps) and is good for Internet TV streaming or other web services heavy on downloads.
Optus believes this new 4G offering will give it the competitive edge, although rival Telstra's 4G network will soon cover 66% of the population. Just this week, Vodafone announced the fastest 4G tablet in Australia, so the 4G battle is firmly in play.
Samsung says TDD-LTE technology will "enable a true global LTE roaming solution" and says demand is expected to increase in countries including Australia, US, China.
It says availability of dual band phones will allow ultra-fast mobile data communications, seamless data communication without delays or interruptions during network handover. The world's biggest phone maker will launch TDD-LTE devices in other markets throughout third quarter.
Optus' says development of new mobile sites, as well as upgrades will consist of combined TDD-LTE and FDD-LTE technologies, so customers with dual mode 4G devices in more places.