Will the mobile secondary card know that there will be text messages after buying a day's traffic?

I won't. The secondary card is also the business of the secondary card. Primary card text messages are only available on secondary cards. After all, the secondary card is a single card. It is impossible for the business master card consumed by the secondary card to receive the prompt. It's like talking on the phone. It's all buckled together. But business is separate. It's just that the expenses are paid from the joint account.