The secondary card can be charged, and the charge to the China Mobile secondary card can be shared with the main card.
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Mobile phone sub-card rules:
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Share with the main card the national long market voice time, short message, MMS number, mobile Internet traffic, wifi time (excluding value-added services).
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Share the main card pre-storage to return phone charges or free phone charges and other benefits; Package mobile phone master and deputy cards, fixed-line local mutual free; Free nationwide roaming call offer.
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Local exchanges between fixed line, main card and secondary card are free for unlimited time;
Mobile sub-card can pay the phone bill online if your mobile sub-card called sub-card paid the phone bill, it is equivalent to the main card paid the phone bill to the main card paid the phone bill, it is also equivalent to the sub-card dropped the phone bill main card and sub-card they are sharing a package, so they are also sharing the phone bill so you pay the phone bill, which number can be paid