What does Unicom's secondary card mean?

Part of Unicom's packages can be used for secondary cards. As a mobile phone package, the supplementary card usually has the following characteristics:

You can share the traffic, voice and SMS in the main card package, and the main and auxiliary cards jointly implement the rules of package traffic speed limit and capping and foreign investment fees.

In Chinese mainland, voice calls (including videophones) between the primary card and the secondary card and between multiple secondary cards are free.

After the primary and secondary cards are processed, the accounts are merged and the bills are printed by the merged accounts.

Please refer to the announcement of departure place for the specific maximum number of tickets, single ticket fee and preferential activities involving supplementary cards.