First download the bill payment APP, then register and log in to the bill payment APP through the mobile phone number, then select "Card Activation" on the homepage, enter the ID number after entering the activation page, then get the SMS verification code, enter the verification code and click "Next", then you will get the inactive Bank of Communications credit card under your name, and then click the credit card to activate it. (Operating system of the above steps: brand model: Xiaomi Mi10 Litezoom &; & glory honor 20 yal-al00；; System version: miui12.1.3&; & ampmagic ui 3. 1.0； Software version: pay the bill. app 4 . 7 . 3 &； & Pay the bill, APP4.7.3)