From the home screen, tap Messages.
Tap the Compose button.
Note: If prompted, tap ALLOW to give the Messages app the appropriate permissions.
Enter a message in the text field.
To send the message as a standard text (SMS) message, tap SEND.
To add an image or other file and send the message as a multimedia message (MMS), tap the Attach icon.
Tap to select an image.
Note: To attach a different kind of file, tap OTHER.
The MMS is now sent.
To exit the Messages application, press the Home key.
Tap the message thread.
Note: Tap the Back key to return to the inbox if necessary.
Received messages will now be displayed.
Note: To save an attachment, tap and hold on the attachment and then tap Save attachment.