What is the charging status of the mobile supplementary card?

The charging standards are as follows:

Function fee: 10 yuan/month, and the supplementary card will receive 100M domestic general traffic every month; Out-of-package expenses: according to the main package foreign investment expenses.

The main card and the auxiliary card * * * enjoy the voice, data traffic and other resources in the main card package, and the local call between the main card and the auxiliary card is free, so that a package can be shared by many people. Through the primary and secondary card products, users' mobile communication costs can be reduced by about 50%.