More on the iPhone plan competing frenzy between all the big providers down under, along with Optus and Telstra we now have info on what Vodafone and 3 are offering with its iPhone 4 plans.

There are no less than eight plans available between these two networks, with Vodafone giving the cheapest deal available at just $29. For this you get 500MB of data per month and $180 of talk and text, but you'll need to pay an additional $18 per month for the iPhone 4 16GB, $24 per month for the 32GB model or $12 per month for the new 8GB 3GS over the 2 year lifespan of the contract.

3 are offering a plan for $39 a month with a much higher data allowance of 1.15GB, whilst the 16GB iPhone 4 will set you back an additional $10 a month, $14 for the 32GB model and $5 extra for the 8GB 3Gs.

If you want any of the phones without paying up front charges, you'll need to sign up on 3's $79 per month plan, whilst Vodafone starts giving out free phones when you sign up to one of their $69 per month contracts.

More details at the source.