ipsi: Already been answered in this thread - it won't work. You need both a touch2pay SIM and a 2 Degrees Galaxy S 3 to use your phone to pay for things, due to software that's only in the 2D S3. You can still use it to top up / view the balance of existing (new) snapper cards.
That's actually wrong - you do not need a 2degrees phone to pay for things. You only need a 2degrees snapper sim card and you can then use it. However, the snapper widget which reads the sim balance does not work, although you can look up your balance on the snapper website (or at a snapper retailer).
I've been using snapper on my Telecom branded phone with a 2degrees snapper sim for the last few days with no issues.