The mobile phone number bound to the postal savings bank card has been modified. Why can't I receive the SMS password when I pay?

Hello, the mobile phone number bound by personal online banking of China Postal Savings Bank and the mobile phone number bound by account change SMS notification service are two system numbers, which need to be modified separately; Please bring your ID card, bank card or passbook to the counter of Postal Savings Bank to modify the mobile phone number bound by personal online banking; I hope my answer is helpful to you.