The secondary card can be charged for phone calls. The charge to the mobile sub-card can also be shared with the main card. Mobile phone sub-card rules:
1. Share the package content with the main card.
2, share the main card pre-storage return or free phone charges and other benefits; Package mobile phone master and deputy cards, fixed-line local mutual free; Free nationwide roaming call offer.
3, fixed line, main card and sub-card between the local mutual play free of charge unlimited time;
4, a mobile phone package, the main and secondary card sharing, combined payment, and the main card as the payment account.