Follow these steps to learn how to send an SMS message on your phone.
From the home screen, swipe up to open the menu.
Tap Messages.
Tap the plus symbol on the top right.
Under Recipient and enter a phone number or, tap the plus symbol.
Tick a contact.
Tap Add.
Tap Enter message and enter a message.
Tap the send symbol of the SIM card you want to use.
Your message will be sent.