Q: iCloud Backup Broken After iOS 9 Upgrade

I think it's fairly clear this is most likely a temporary issue that will clear as server load reduces.

You need to reinstall iOS 8.4.1 while it is still signing and do a quick backup through iTunes then restore through iTunes and then iCloud should work.

iCloud backup works just fine with iOS 9. Again, the servers are inundated right now. You might get in during a lull, as I did a couple of hours ago, and the backup will occur without any issues. There is no need to mess around with your device, and downgrade the iOS. This is not an iOS-related issue. It is a capacity issue with the servers.

If everyone will just calm down and give it a couple more days, things will start to level out and will go back to normal.

Millions of people all trying to access and utilize the servers at the same time - it's a traffic jam. Time for a little Zen moment....

Cheers,

GB

I don't think it is a server load issue, as my iPad Air backs up just fine. I should point out however that it is running iOS 9.1 beta. Interestingly when it was running iOS 9 GM, it had the iCloud backup issue, but after upgrading to iOS 9.1 beta it fixed itself.

Further to this, on my iPhone 6, under Manage Storage my iPhone 6 shows that I have 0KB of data backed up, which is not true. When I look up the backup options, it shows all of my apps have "No Data", which is also not true. Also, it says I am using up 1.2GB of my iCloud storage, however my iPhone backup shows as 0KB, and my iPad Air shows a backup size of 522MB. That doesn't add up - it's almost as if my iPhone backup is there, just not showing up.

So I tried updating my iPhone 6 to iOS 9.1 beta, hoping it would fix it like it did with my iPad Air, and it didn't. Problem persisted. iPhone 6 restored back to iOS 9. Still can't backup.

I am not saying this is a server issue, I think this is a firmware/device issue so a restore may need a restore, the servers have nothing because everyone has there own 5 GB iCloud Storage

+1 -> This issue seems to self resolve, you just need to be patient. I have quite a few clients that had the same problem...it's self resolved (without annoying downgrades/upgrades etc) in nearly all cases.

in Manage Storage all my Apps say "No Data" instead of sizes, and Next backup Size is Zero.

This seems to be an issue on the phone itself, it hasn't gone to the Server yet, so I don't see how the Servers being busy is responsible

Are you an Ashley Madison web dev?

at one point after the Progress bar was done (and it said backup failed) it shows 1.5G available, which would suggest the BU was there, but now after several attempts it says 3.6G available, as if it isn't there now.

I am apart of it, but barely

The servers have everything to do with it. There is nothing wrong with the iOS. Earlier today my iPhone wouldn't back up to iCloud. Tonight it did. I got in during a lull. Everyone just needs to relax. There may be some devices with unique issues, but by and large this is just a case of everyone trying to access the same place via the same road.

The fact that everyone has their own 5GB (or more) of iCloud storage reserved for them is irrelevant. You all still have to access it via the same servers that are being pounded by people trying to update to iOS 9, restore because of issues, upload and download to and from iCloud Photo Library, iCloud Music Library, iCloud Drive.

Until thing settle down, you won't know if you have a unique issue or if you are just suffering from the same bottleneck that most of us are. So, there is just no advantage to trying to reset, restore, erase, modify, or otherwise mess with you devices right now.

BTW - My iPhone also said Last Backup = Never, Last Backup = 0GB. Now it is all reset and normal looking because my phone was able to back up. I did not initiate it. I just plugged the phone in and let it alone for a couple of hours.

Best of luck,

GB

are the Servers the reason all the Apps are listed with "No Data" instead of sizes in Manage Storage, and the Next Backup is listed as "Zero" ???

Yes.

GB

If it is just the servers, why is my wife's iPhone, which is still on 8.4, still backing up nightly to iCloud without a hitch, while my iPhone and iPad are unable to backup. Unless iOS 9 uses different servers, there is some bug in iOS 9, or in the way the servers deal with iOS 9

This is not a server issue, nor a device problem.  There must be a bug with iOS 9 that breaks iCloud backup.  I have done multiple restores to earlier backups on my computer and iCloud to no avail. I have tried to delete my last backup in iCloud and cannot, getting an error that a backup or a restore is running (but have confirmed it is not). When I turn iCloud Backup off and on again, I get an error that I cannot backup my device to iCloud and it too says Never in last backup, even though I can see it when logging into iCloud portal.  I guess we have no choice but to eagerly await a fix from Apple.  In the meantime tell friends and family NOT to upgrade to IOS 9 until Apple resolves this issue.