I have been a Vodafone prepay customer for 6 years now and i find their mobile service is getting better now and more cheaper, but there is only one downside - their prepay broadband service - i have found im getting constant 3G connection dropout when im surfing the net.
To sum it up if you want a good prepay mobile service definately go with Vodafone

Excellent staff, helpful health advice, great prices on everyday health items, excellent prices and a good range on men fragrances and i have made it my only pharmacy in Mandurah.

Great customer service, excellent coffee, delicious pies and slices(yum!!!!) and great prices!!!