How to find out how much traffic is used by the primary and secondary cards?

To inquire about the traffic usage of the primary and secondary cards, you can use the primary and secondary card numbers to log in to the online business hall /0 1HBZ, and click self-service > business inquiry > usage inquiry > Internet traffic to inquire about the remaining traffic. If you still have questions after the inquiry, you can check the detailed list to understand the specific usage, or contact the local manual customer service or go to the local business hall to verify.

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