iPhones in the US work in Australia? Understanding 'Bands'

Hey all - I am buying 2 phones UNLOCKED in the US and wanting to use them in Australia. The Bands we have are as follows:

The Aussie bands are

4G/LTE bands

Australia is currently using these LTE bands

2100Mhz (B1) – Telstra (a handful of sites), Optus (Tasmania), Vodafone

1800Mhz (B3) – Telstra, Optus, Vodafone

850Mhz (B5) – Vodafone

2600Mhz (B7) – Telstra, Optus

900Mhz (B8) – Telstra (a handful of sites, utilises spectrum previously used by 2G)

700Mhz (B28) – Telstra, Optus

2300Mhz (B40) – Optus (Vivid wireless spectrum)

The US bands on the Apple site say?

So it's safe to ass