Is the SMS notification of the balance of the original bank card number sent to this mobile phone number after the mobile phone number is down?

The bank will send SMS notification according to the number of the signed agreement, so your balance change reminder will still be sent to the original mobile phone number.

If the mobile phone number that receives the balance change reminder needs to be maintained at the bank counter, it can also be maintained by itself in online banking. Therefore, it is best not to stop the mobile phone that receives the reminder of balance change. After downtime, SMS can't be received. If you need to change, you can go to the counter with your ID card and bank card, or you can log in to online banking to make self-help changes. To change the mobile phone number, you need to send a verification code to the new mobile phone number. After verification, you can use your new mobile phone to receive SMS reminders.