Changing the reserved phone number for Bank of Communications Credit Card (Bank Center Credit Card Center Credit Card Application) means that the cardholder changes the mobile phone number bound to the credit card that was reserved when applying for the credit card. A reservation phone number will be filled in. After the credit card application is approved, this reserved phone number will be bound to the credit card. In the future, whether there are changes in the credit card account or other contacts between Bank of Communications and the cardholder, they will be done through this credit card reserved phone number, or even the opening of a credit card. The credit card reservation phone number is usually required for verification, so the credit card reservation phone number is very important information.