Knot sure exactly what you mean. I think you're asking if you use up all your data are you automatically charged for more data??
If that is what you're asking the answer is NO.
Whatever plan you're on the amount of data with that plan is all you get for the 30 day pay period.
If you use up all the data before that period you're options are.
1- wait till your renewal date and when you pay your next 30 day plan your data will renew.
2- Buy a data add-on in your self serve account (expensive but it's an option)
3- contact moderators via SIMon the chat bot ( the ? Mark on bottom right) and ask them to renew your current plan right away. You would be charged immediately and your new 30 days will start.
4- Change your plan to one with more data (again you would be charged right away for your new plan and loose what you paid for on current plan IF you select "change now" or you can select "change at next renewal" which means you'd keep current plan WITH NO DATA LEFT FOR THE 30 DAY PERIOD and at your renewal date your new plan you select with more data will be charged and you'd be on that plan for the 30 day period.
