We are heading over in 8 days (not that we're counting!). . Last year we purchased AT&T simcards with cheapie handsets on Big Island on the $2 per day plan. It worked fine but now we are wanting to access emails etc so the iphone is a better option for us. So This time we are bringing our unlocked Aussie iphone4 and i was wondering if we could use those same sims (i have a sim cutter to convert it to microsim) and go with the same deal $2 per day and add a data plan. I've checked the ATT website but wanted clarification on a Couple of issues .
1/ would the sims purchased in 2011 have an expiry date ?i.e. could we top up the existing sims for this visit?
2/ does ATT data plan work on unlocked aussie iphone4 ?
3/ can we prepurchase the credit online before we go so we dont have to go hunting for a store when we arrive?
I know there are sites like travelgear where we can arrange a new microsim/plan before we go, but seeing as we already have sims from our last visit, it would keep costs down.