How to query the remaining traffic of King Card with 40g free traffic?

According to the information you provide, you can know by querying your total flow. You can go to the menu bar-Service-Query Processing of Wangka Assistant WeChat official account to find out. You can also download China Unicom APP client to keep abreast of traffic consumption.

You can check the mobile phone traffic through the following channels:

[1] log in to the online business hall /0 1HBZ, and click "phone bill inquiry" > "usage inquiry" > "online inquiry";

[2] After logging in to China Unicom APP client, click Services > Inquiry > Traffic Business Inquiry > Internet Traffic on the homepage;

[3] 3G and 4G mobile phone users can send short messages CXLL or 107 1 to 100 10 to inquire about traffic usage.