If it is a China Merchants Bank credit card, to modify the mobile phone number (only a unique number can be bound), you can log in to the professional version of online banking (credit card), click "Customer Management--Data Modification", and follow the prompts to take effect immediately. (Please confirm that your professional version has been associated with a credit card. If it prompts that there is no associated credit card, please first associate the credit card in "Professional Edition Management", or you can call our customer service hotline and select 9 to transfer to manual verification and processing for you. After manual modification The mobile phone number will be effective before 24:00 the next day)