Two mobile phone cards can be used to charge a second card.
Primary and secondary cards are introduced by telecom operators
Suitable for busy business and many family members of the mobile phone business plan.
It is characterized by the main and secondary cards sharing a package, saving costs, convenient payment, recharge to provide the main and secondary cards any number can be lost. However, the primary and secondary cards can only be bound to one ID number, and if the mobile phone is lost or the k phone card is damaged, only the bound ID number can be used to replace it.
Of course, the sub-card of the mobile phone can also give the sub-card to charge for the phone
Yes, just enter your phone number and confirm the recharge