Mobile phone: iPhone12

System: iOS14

Software: Dongka Space APP

1. Here I use Dongka Space APP Taking the operation as an example, we open the card space, log in, and click on My Bank Card.

2. Then you can see all the bank cards you have bound. I used the debit card of the Agricultural Bank of China to repay the credit card. What if I want to change to a debit card? Woolen cloth? We click on Bind Bank Card at the bottom.

3. You will be asked to enter your payment password here to ensure security.

4. After entering the password, you will be prompted to bind the bank card. Here you need to enter the bank card number and click Next.

5. Then you need to enter the mobile phone number reserved by the bank and fill in the SMS verification code.

6. At this time, you will see a pop-up window prompting you that the binding is successful. Click I understand.

7. Then go back to the previous credit card page, find the credit card you want to change, click in, and change the already bound debit card.