How does the secondary card use the traffic of the primary card?

If you use Unicom sub-card products, you don't need to do anything. The secondary card can enjoy the traffic, voice and SMS in the primary card package, and the primary and secondary cards can enjoy the SMS in the SMS network age upgrade plan.

Tips: Free traffic, free traffic, directional traffic (such as WO+ video, WO+ music, Sina Weibo), international traffic packages and international long-distance packages cannot be enjoyed.

Due to the different business rules in different provinces, the local customer service shall prevail.