Online banking changes, phone changes, and counter changes.

1. Online banking changes: If the old mobile phone number is still in use, you can use the old mobile phone number to log in to the credit card personal account homepage, and the credit card personal information in the personal center can be successfully modified.

2. Telephone modification: Use the reserved mobile phone number to call the card issuer’s 24-hour service hotline and apply for changes to the manual customer service. The customer service will ask the cardholder to quote their ID number to verify their identity and provide the required information. Modified new mobile phone number.

3. Modification at the counter: If the old mobile phone number is no longer used and you want to modify the reserved mobile phone number, the cardholder needs to bring a valid ID card, credit card, and new mobile phone number to the card issuing business. If the modification is processed at an outlet, others are not allowed to do it on your behalf.