I've found that suggestion to restore as new elsewhere too now, thx. I'm really hating the thought of having to do that. I have a 128gb model with a lot of apps. Had to previously do a restore from back up and lost all the text conversations in Messages app. That was a major blow but fortunately they still reside on my iPad. There there seems to be an issue when restoring from an iCloud backup that was created from an 6s or 6s Plus iPhone. Very frustrating!
I wouldn't put too much faith into a clean install fixing this if my experience is anything to go by. Apologies for the massivo essay!
I initially restored from a 6+ backup to my 6S+. All was well apart from muted alert tones. So I did a 'reset all settings'...and then my phone got stuck in a bootloop at the Apple logo. A hard reset wouldn't fix it, and neither did leaving it for half an hour hoping that it would progress beyond the Apple logo. So I had to do a DFU restore, install iOS 9.01 via iTunes and then install my backup again. All was well apart from the muted alert tones again. So I did another 'reset all settings' and got stuck at the Apple logo once more.
I did another DFU restore and installed my iCloud backup, only this time I decided that I would get all the data transferred from my phone to the pc with the intention of starting afresh with a clean install and no backup. After copying over 12GB of photos and videos I did an 'erase all content & settings' in order to set my phone up from scratch. This again caused a bootloop at the Apple logo (*majorly hacked off at this point) and I had to yet again DFU restore 9.0.1
I then set my phone up as new and toddled off to bed.
My alert tones were a normal volume now thank goodness, so the next evening I downloaded all my apps (engaging in a homescreen cull in the process) and agonisingly set about importing all the photos & videos from my pc. Then I deleted my old iCloud backup and created a fresh one off my 6S+. It was a success, apparently. Over the next couple of days no auto-backups occurred though! How could this be??
Then I was reading on the forums about 3D Touch not working for some folk on certain homescreen icons. Lo and behold, it was the same for me too. My Maps app had zero 3D Touch action, neither did the App Store, and the Phone app only gave me 'create contact' along with the Messaging app only offering 'new message'. SO, as I was fairly busy and not needing my phone for a while I thought that I'd do an 'erase all content & settings' and do a fresh installation of my brand new iCloud backup. This should have been a walk in the park but
oh no, Apple's wonky new iCloud/iOS9 combo had other things in store for me! At least there was no Apple logo bootloop this time, not using my old backup had cured that, but the new iCloud backup failed to install any photos or videos onto my phone. What was showing on iCloud as being a 12GB backup size only gave me a 1GB phone installation. What the heck?? I erased all content & settings and tried again. Exactly the same issue. So my brand new iCloud backup that I slaved over for two whole evenings is a corrupted pile of cr**.
Not to mention that my 3D Touch homescreen icons were still crocked!
That's where I'm at. Severely hacked off with iCloud. A feature that has worked flawlessly on several iPhones over approximately five years is now basically broken, for me anyway. How can a clean install of iOS, downloading the apps manually, installing photos & videos manually and then creating a brand new iCloud backup on a 6S+ running iOS 9.0.1 fail to install on a 6S+ running iOS 9.0.1 ??
I'll attempt the whole tedious process once more when iOS 9.1 lands, but not before!
😡