Hi all,
Found this deal via this and thought it's pretty good. I have the phone myself and have had very little issues with it.
I am not sure if this model is compatible with Australia, but it seems fully unlocked and the bands work here. So….
Notice - Please Read Before Purchasing
This phone is soft unlocked using a modified firmware (H83020i_un) that removes the carrier lock, however this is only true so long as the current modified firmware stays installed.
This means future firmware upgrades, whether it is OTA or 3rd-Party, may cause the carrier lock to be active again. See Comments below for discussions.
Missing band 28. Heres the band support for the T-Mobile version of the phone.
https://i.imgur.com/HkZmymN.png
The version you will really want is the "H860N" version which is the global Taiwanese variant with dual-SIMS slot and also the most coverage of all the LTE bands.