2. For details after opening, please click the circled I next to the phone.

3. Open the details of the SMS sender, add existing contacts and create new contacts.

4. Select to create a new contact here, and finally click Finish to add it to the address book. You can click the "Add Attachment" button (paper clip) below in the SMS editing interface-select a contact-click the contact to be added-and then click "√".