Why did I receive this message?
- To let you know that you have replied incorrectly to a text message you have received.
- To let you know that the text message you have just sent has not been received.
- Your reply should follow the correct format as stated on the original text message. The format is <SHORTCODE><space><KEYWORD>. For example, ABC YES.
- To let you know that the number you have replied to cannot accept "conversational text messages" and will only receive messages that use the above keyword format.