Messages app crashing I can't open Messages app on my iPhone 5S with iOS 8.3 (no jailbreak) - it crashes on start. I suspect a malformed message caused this, so I want to delete all messages from all senders to see if it helps.

I tired allowing iOS to delete messages older than 30 days, but it didn't help - the bad message is recent, and I can't afford waiting a month to be able to use SMS again. I also don't have any older backups I could restore.

Is there any way I can delete all messages without opening the app itself? Or some other way this problem could be fixed?
It could be the recent iMessage bug. Here is the fix Apple has provided on its website. Hope it helps.

support.apple.com/HT204897