Changing the reserved mobile phone number has no effect on the card under normal circumstances. If you need to modify the mobile phone number of a credit card (generally used to receive SMS reminders), please log in to the professional online banking (you need to use a certificate to log in, and select a credit card after logging in), and click "Customer Management-Phone and Company Name Modification", which will take effect immediately according to the prompts. Tip: Please confirm that your professional edition is associated with a credit card. Customers and supplementary cardholders who have not applied for the professional version should call the credit card customer service hotline to modify their mobile phone numbers. The manually modified mobile phone number will take effect before 24: 00 the next day.