What is the function of the supplementary card of Unicom mobile phone card?

There is no difference between the main card and the auxiliary card of Unicom, but the mobile phone package used is different. The secondary card does not have its own package fee, but uses the package of the main card.

The secondary card can only be used for data access, and does not have communication functions such as short message and call. It only supports domestic data roaming, similar to the USIM card in the 3G wireless network card.

In addition to making full use of the package traffic, the main card and the auxiliary card are charged uniformly, and the two cards do not interfere with each other. The secondary card can only be used for data surfing, and has no functions such as short message and call, and only supports domestic data roaming, similar to the USIM card in 3G wireless network card. Therefore, there are no hidden dangers such as charging errors or privacy exposure when users use data daughter cards.

It is very convenient for users to handle the master and slave card packages of extended materials. Users can handle it through Beijing Unicom Store, 100 10 online business hall and mobile phone business hall client. At the same time, payment is also very simple. The package is paid by the main card, which saves the trouble of paying separately. Users can also handle the bank card withholding business and pay easily without leaving home.

The main and secondary card package launched by Beijing Unicom is more cost-effective than the package handled by members alone, and the resources in the package can be used more flexibly, avoiding the problem of voice and traffic waste in the package. Users of the primary and secondary cards can dial each other for free, which further saves telephone charges.

On the other hand, this is another important measure for Beijing Unicom to actively respond to the "speed-up and fee reduction" action after taking the lead in opening broadband speed-up. It is reported that Beijing Unicom will plan to launch a number of innovative services in the future to provide users with more affordable and diversified choices.

Baidu Encyclopedia-Unicom Data Card