When that casual plan came out I was stoked and tried it immediately with my 2.5G iPhone running 1.1.4.
I was a bit gutted when I got charged the $20 that i had just topped up with after only using GPRS for about 10 minutes. I rang vodafone and they said it only works with vodafone live handests and not hacked mobiles. They wouldn't even refund my $20! So I cancelled my data with vodafone to stop random connection charges and because it would be too expensive to use anyway.
People are saying this $1 a day plan will work with all prepay mobiles because vodafone can't tell you are using a hacked phone. True, but they can tell you aren't using a v live handset. (try going to http://live.vodafone.com)
Can anyone confirm that they are using the $1 a day rate successfully on their iPhone and if so how you did it?