If your data runs out or your plan expires, your connection will stop until you refill your plan.
You can refill your data bundle at any time and data becomes available immediately. You can also enable auto-refill to refill automatically when your data runs out. Note that auto-refill does not roll over unused data.
Manual refills roll over remaining data. For example, if you have 5GB remaining and add another 5GB, your new total will be 10GB.
Refilling a plan resets its expiration date. For example, refilling a 30-day plan on day 20 gives you a fresh 30 days from the date of the refill.