I was running 4.3.4 (ignored last update) and some funny things happened to my iPhone 4 while I was sending an MMS. When I clicked send, the phone immediately went to the all black screen with the apple logo and brought me back to the lock screen. I thought this was strange enough, but I went to the messages app to find out all of my messages were gone (I had 30,000 or so). I checked everything else on the phone was still there. I am currently restoring from last backup to fix this problem (2 days old but that is a different story). To make a long story short: Has this happened to anyone else? Or do you have any ideas about why this could have happened?