The main card and sub-card call charges can be charged to the sub-card, there will be no impact, can be shared and used. Because the main card and the secondary card are in the same contract number, although the call charges are charged to the secondary card, but they are in the same contract number with the main card, and the arrears of the primary and secondary cards can be deducted, so there is no problem in charging to the secondary card, which can be shared, and the call charges of the main card can be deducted, unless there are special restrictions on the use.