Am currently with Vodafone and looking to upgrade my wife's old phone. The Red Plans $80 and above come with double data for next 24 months.
$80 Plan - 4+4 Gb + 1 GB in case you buy it online - Total 9 GB
$100 Plan - 6+6 Gb + 1 GB in case you buy it online - Total 13 GB
I am sure if you call up Vodafone, they will throw in the extra 1 GB for buying it online.
Do you know if you're able to upgrade your phone online? I have a few months to go on mine, so am thinking of upgrading, but the extra 1GB would be nice too.