If Messaging is disabled, ensure that Messages is set as the default app.
From a Home screen, swipe up to access all apps.
Tap Messages .
From the Inbox, tap the Plus icon (lower-right).
From the To field, enter a 10-digit mobile number or a contact name then tap the Done icon (lower-right) .
As the number or contact is entered, a matching contact may appear and can be selected at any time.
To add an attachment:
Tap the Plus icon (lower-left).
Tap the attachment type (e.g., pictures, videos, audio, etc.).