Cause 2 of 2: The text message isn't written correctly
To send a text message, you need to write and send it correctly.
Solution: See how to write and send a text message.
1 Create new text message
Press Messaging.
Press the new message icon.
2 Select recipient
Press Enter one or more recipients and key in the first letters of the recipient's name.
Press the required contact.
3 Write text
Press the text input field and write the text for your text message.
See how to write text.
4 Send text message
Press the send icon when you've finished your text message.
5 Return to the home screen
Press the Home key to return to the home screen.