Why can't the main credit card receive the SMS from the secondary card?

Hello, I'm glad to answer this question for you. The main card of a credit card can't receive short messages from the secondary card, but the main card can receive short messages from the secondary card. The main card can know the consumption of the secondary card through SMS. Since the amount of the supplementary card is specified by the cardholder of the main card, the main card can generally know the consumption of the supplementary card. If you can't receive it, it means that the SMS function of the main card has been turned off or the card has been modified, and the SMS center number of the mobile phone has been used, so that the main card can't receive the information of the auxiliary card. You can go to the bank to handle the operation in time. I hope my answer can help you. Thank you.