We added the Boost feature to eliminate bill shocks and to give you further data top-up options so that you never run out of data.
You can choose to top up your data by 500 MB, 1 GB and 2 GB if you're running low by buying a Boost. The data will be instantly added to your plan and charged on your debit / credit card on file.
If you're afraid you won't be on it all the time, you can turn on Auto-Boosts! Head this way to find out more about Auto-Boosts.