Here's what worked for me....
Got the message on Tuesday and been trying all the fixes in this forum multiple times and two symptoms continually to occur:
1. I wasn't able to open messages icon - white screen and quick flash to the desktop.
2. Performing a backup/restore in iTunes kept crashing saying - iPhone disconnected. It also caused issues in Ibackupbot.
What fixed it:
1. Copy any existing iPhone backups to another directory. Completely empty/clear the directory that stores the default iTunes backups
2. Do/attempt a full backup of the phone.
3. Download Ibackupbot - didn't have to buy prem version.
4. In the top left pane you have one item (mine says Johnny Rocket's Iphone - May 29,2015) make sure that it is highlighted and ( You should be able to see a picture of your phone on the right side now).
5. Click on messages in the list below the picture of the phone.
6. I sorted by date and deleted all messages from the current date all the way to a day before i got the offending sms message. right click and "delete selected items" (this process took me a couple times, as the program would randomly shut down but eventually i got it to delete the messages i wanted.
Next:
7. Expand your iPhone backup in the list on the left and click System files under the root of your device backup.
8. Then MediaDomain
9. Click Library, then SMS.
10. Keep both folders "Parts" & "Attachments" BUT delete everything inside both those folders.
11. close the application. To make sure everything i wanted gone was gone, i re-opened the app "ibackupbot" and double checked. Closed that app after the check.
12. Put the iPhone into recovery mode...don't just turn the phone off without putting into recovery mode (look that up if you don't know how to do it....super easy.) After it comes up and iTunes recognizes it's in recovery mode it's going to ask you 2-3 questions.
13. First option i took was "restore" NOT update.
14. Next question says restore and update. Yes
15. After it loads the OS, in iTunes it asked for iCloud verification and then if i wanted to setup a new phone or restore from backup. I chose restore from backup.
520 apps and all my data with the rest of my text messages in 2 hours....done. I can use messages again without it closing on me and i'm able to scroll up through the text messages without any issues
