However, before the first step, try logging in to i and removing your device from the Find my i Phone portal.
Although backing up and immediately restoring to that same ‘buggy’ backup seems redundant, it actually flushes out the weirdness and when the phone boots again it will be able to complete the upgrade. Update: Apple has now provided additional recovery steps.
Please refer to this post: Most Common i OS 11 Problems and Fixes It's been almost three years since the first release of i OS 8, and Apple is going to launch Big Update – i OS 11 this year. There's a ton of junk files that mostly are not needed but is still using up a lot of space on your devices, and they can't be cleared manually.
Just like you thought, every new i OS update brings new issues, and there will be no exception with the latest i OS 11. Phone Clean, a professional i OS cleaning tool, can help to delete all that junk for you, no matter useless and unnecessary temporary files, log files, browsing/app cache, cookies, bad/empty/corrupt files and other unwanted files on your devices, helping you to reclaim up 40% - 60% storage space, a big deal to the 8GB/16GB devices. Delete All Text Messages Even in i Message App Related Articles You'll Need: How to Completely Delete Text Messages from i Phone Software Update and click update, and then wait for the i OS 8 to load.
Here're some detailed solutions to solve the problems for more free space.
You Also Can't Miss: How to Free up Space on i OS 9 Devices Actually, when your device has no available storage, you probably won't need to delete anything to do it.
Developers using the i OS 9 GM seed released last week are also able to update to today’s release over-the-air, although the same error message is impacting those users.