Why can't I display my contacts and text messages when I replace my mobile 4g card with a mobile phone plug?

First, you need to see if your previous contacts are stored in your phone, and second, you need to see if your new phone is set to "show only phone contacts".

"This item is specially set in the mobile phone: contacts-contacts to be displayed-select all contacts. In addition, after changing the mobile phone, the text message is not visible because it is stored in the mobile phone by default, and it will be gone after changing it. Hope to adopt.