In Auastralia the plan I've just moved to (http://www.tpg.com.au/mobile/plans.html http://www.tpg.com.au/mobile/plans.html) gives me enough calls, text and data

In Auastralia the plan I've just moved to (http://www.tpg.com.au/mobile/plans.html http://www.tpg.com.au/mobile/plans.html) gives me enough calls, text and data for $15 a month without any lock in. I've been looking into US contracts in preperation for a move and was shocked at the rates people are willing to pay.