How to activate iPad plug-in mobile phone card to receive SMS?

1. Click the Settings icon on the desktop.

2. open "imessage".

3. Enter an Apple account and click the "Login" option.

4. After system verification, it shows that iMessage has been activated and turned on.

5. Click the "imessage" icon on the desktop.

6. Click the blue plus icon in the upper right corner to open the address book on the iPad, and select the contact who wants to send iMesaage.