Can the mobile primary card number be converted into a secondary card?

Can be converted into a secondary card. First of all, we must confirm whether the number we use has a joint account. If necessary, you should first go to China Mobile Business Hall to separate the number, and then make a supplementary card under the number to be included (only one supplementary card can be added to the family package). When handling, you need to bring your ID card and the person who needs to split the account to the business hall where you belong.