For no apparent reason, I am continually receiving a "text message not sent" notification on my status bar. When I "clear" my notifications, it removes it until the next time I go to text messages and it pops up again. I have deleted all of my messages, powered down and removed the battery to try to stop receiving the notification, but it constantly pops up. I have not experienced any problems sending or receiving text messages. Any suggestions on how I can fix this annoying problem? Thanks in advance.