The sub-card can receive SMS notification after charging the phone charge.
The sub-card is a card that shares the account balance and package resources with the main card under the same account. The sub-card, like the main card, can receive SMS and phone calls. When the sub-card is recharged, the remaining phone charges will be added to the main card, but the sub-card will also receive SMS notification of successful recharging.
You can see it! You'll get a text message when you charge your phone