Telstra, Optus, and Vodafone might share the same physical tower though (while using different antennas and RRUs). But that's only an issue if there are severe

Telstra, Optus, and Vodafone might share the same physical tower though (while using different antennas and RRUs). But that's only an issue if there are severe interference issues there (on all the bands the author is connecting to) or if the tower itself suffers some catastrophic damage.