Can I still see the contents of the previous app after changing the card of Apple's mobile phone?

The mobile phone card mainly completes two functions: storing data (controlling access to all kinds of data) and completing the whole process of customer identity authentication and customer information encryption algorithm under safe conditions (personal identification number PIN and authentication key Ki are correct). Changing the card does not affect the mobile phone application software, address book and information.

The mobile phone card stores the International Mobile Subscriber Identification Number (IMSl). User keys and security algorithms. Personal password (PIN code) and SIM card unlocking password (PUK code). Users can store some personal information such as fixed short messages and directories in the SIM card, and the content will remain after changing the calling card.