Some iPhone MMS failure has been reported by iPhone user. Error message like “MESSAGE SEND FAILURE” prompted after sending the message… some user rebooted the iPhone but the error still occured. Fixing iPhone MMS failure There is pretty good tips how to fix this error from cnet.com, here how to fixing the MMS send failure error message.

• Connect your iPhone 3G or 3GS to your computer.
• Launch iTunes and go to the Summary tab for your iPhone.