Unless you want to pay for Telstra's $200/month unlimited plan. In any case, these faster speeds will help push data quotas up as people chew through their data within minutes.
I can see the headline now "thousands of people hit with $100k phone bills after malware spread through phones"
Back in the day, carriers would waive excess data charges, at least on the first occurrence if it was due to a virus on your phone.
These days getting viruses on phones is a lot harder, it does happen, but there are a number of ways to counter it. Also all carriers here must notify you by SMS when you've exceeded 50%, 85% and 100% of your data allowance, so it basically puts the onus back on you to do something about it.