Each plan has a DATA allowance. from 50GB all the way up to 500GB.
At any time, you can upgrade or downgrade your Rocket WIFI plan to allocate more or less data.
Each month from the date you sign up, your account is allocated the nominated data allowance, Simply log into your account and change you plan anytime.
From your monthly renew date the new plan will be allocated.
Alternatively, if you just need a little extra data for the month. you can also obtain a data top up. SEE HOW