Under the rules of the promotion, those Vodafone customers who sign up for a month-to-month plan for $45 AUD ($43 USD) or more, or a 12 or 24 month plan at $60 AUD ($57 USD) or higher, will receive twice the amount of data that they paid for. Vodafone's customers are using 61% more data this year than last year. On top of that, they are using 50% more than the average customer on other Australian carriers.
The extra data is good for the term of a customer's 1 or 2 year contract, and for those paying month-to-month, the promotion is good for 24 months. Those signing up for service between now and January 3rd are eligible for the doubled data. Counting the extra data, the operator's Red plans now offer 3GB of data for $65 AUD ($62 USD), 5GB for $80 AUD ($76 USD) and $100 AUD ($95 USD) will buy you 10GB of data.
Vodafone Australia is said to also be working on a data sharing plan, so subscribers should be on the lookout for that announcement in the near future.