I'm having issues with my iPhone 6, latest iOS . I thought it was my old phone (I'd dropped it loads of times) and I think there might still have been an element of the problems to that but Apple gave me a replacement 6 about 6 months ago and I'm sill having the same issues, lag between opening apps, switching between apps, bringing up the keyboard and even entering pin cold, it's not all the time with all these issues but overall the whole iOS seems sluggish. Surely the 6 is up to coping with iOS 9? I appreciate the simple solution would be a fresh install and i'd happily do that if iTunes backed up all my old texts too. But it doesn't and I have lots of important info in my text and often refer back to them. Any suggestions on how to clean up the iOS as much as possible before backing up and restoring? Should I just delete all apps? Then back up, reset all setting and just add the apps back in after the restore? Would be a pain but I'm desperate to get it running properly.