The second generation social security card financial account has been opened. Do I need to open the third generation social security card to upgrade?

No need. When you have a second-generation social security card and have opened the SMS notification service for financial accounts, when you have a third-generation social security card, the SMS notification service does not need to be reopened and can be used directly, because SMS notification is related to the financial account you hold. After upgrading to the third-generation social security card, you only need to update the bank card number and the second-generation ID number to continue to use the service.