2 Replies Latest reply: Nov 1, 2012 8:39 AM by moe13 RSS

Text Message Error Code: 21

When I try to send a text message to one of my contacts, the message doesn't go through. A notification pops up after a few seconds, "Message not sent", and a red triange with an exclamation point shows up next to the message.

 

When I select "message details", it says "Error Code: 21".

 

I have no problem messaging my other contacts. 

I have been unable to find anything relating to this error code, and I'm wondering if anyone has any idea what it means?

Thank you for any and all help!