iPhone 6 plus messages app freezing crashing iOS 6.1
When opening sms or iMessage messages, screen will regularly pause for 10-15 seconds on a blank white screen to reload content, or if a lock screen shortcut takes me directly to the messages app it will freeze with just the last text bubble visible (no previous messages, no keyboard) for 10-15 seconds before loading.
Resetting iMessage from off to on, and resetting network settings has shown very limited success, but only for a matter of minutes before reverting. Often after 10-15 seconds, the app will crash before reloading.
I have also attempted to do a factory reset and then restore from backup (of the 6 plus) and the problem persists.
iphone 6 plus, iOS 8.1
iPhone 6 Plus, iOS 8.1, messages app