Joke Collection Website - Blessing messages - How does the Nokia 2700c know how much traffic it uses?

How does the Nokia 2700c know how much traffic it uses?

Call 10086 to check the current traffic usage. In addition, Nokia phones also have traffic counters in the call records. You'd better clear them once a month to accurately grasp the traffic usage. In addition, when your traffic falls below 10086, a message will be sent to remind you.

Send CXGPRS or 192.

To 10086