First, open my bank card in my personal information.

Select the bank card that needs to change the reserved mobile phone number of the bank.

Select "Unbind"

After the unbinding is successful, add the bank card again.

Enter the card number and other related information to complete the binding.

Enter the new bank reserved mobile phone number, and after verifying the information, the bound mobile phone number is modified successfully.

Method 2: Modify the reserved mobile phone number when paying.

If you find that you need to modify the bound mobile phone number during the payment process, you can modify it according to the prompts in the prompt process.