Which data is taken first? the upgrade data or the data you are given?

Karl B. #29906
Karl B. #29906 Posts: 214 ✭✭
Quick question. Say someone has 250MB data and i give him 500MB data. I know that the 250MB CAN roll over to the next month, but the 500MB data CANNOT (from what I've been told in a previous question, it lasts for maximum 2 billing cycle).
Which of this data will be "used" first? the data that rolls over, or the other "kind" of data?


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