Interestingly TPG have thrown their hat in the ring and have said they will be bidding too..
Can't imagine TPG building their own network. If TPG win the spectrum, that maybe the trigger for close ties between VHA and TPG. Telstra may get capped in the auction. If Optus have any brains they will go hard to stop TPG/Voda. But I don't credit Optus with having a lot of Brains.