A Monthly Data Add-on lets you easily manage your changing data needs and offers you the flexibility to add more data anytime, without having to change your plan. Just text DATA to 222, choose the data option that’s right for you, and you’re set!
You can add a Monthly Data Add-on both before and after you go over your plan’s monthly data limit. However, if you do so after you reach your plan’s data limit, you will still be responsible for any data overage charges you incurred before adding the add-on.
The data add-on will be added to your account immediately, and will stay on your account every month until you wish to cancel it. You can cancel a data add-on anytime when you no longer need . If you are on a Shared plan, the data will be shared between all the lines on your plan.”