Sometimes you just need a large amount of data at once. Telecom operators often offer something like an extra gigabyte for AU$10, which can really add to your phone bill, but now there's another way. Data-hungry Optus users are in luck: telco has announced a new data deal that gives customers 24 hours of unlimited data for an extra €5 per day. Optus likens the "Unlimited Day of Data" add-on to an all-you-can-eat buffet, where customers will have 24 hours from activation to deliver as much data as they want. "This may imply excessive consumption of Netflix in high definition over 24 hours, which would normally go through 72GB of data," Optus spokesman Matt Williams said. If you rarely notice how much your data allowance is being used each month, the new AU$5 add-on is probably a good option for you. It's suitable for someone who needs a lot of data from time to time - perhaps for times when your home internet connection isn't working or you want to stream video while you're on a week-end trip - so the €5 AU supplement can also help you switch to a cheaper plan. One day of unlimited data is only available on certain plans and to prepaid customers with a top-up of AU€30 or more. Do you need these additional data? It's only available through the My Optus app, so be sure to download it to get started.