Open Radar

 
Area:
Software Update

Summary:
I was running iOS 11 Beta 5 and downloaded the OTA update for iOS 11 Beta 6. The update screen in Settings.app said "Preparing Update" beneath the progress bar, and the table cell (button) said Downloading... 

I rebooted the phone, and nothing happened. Settings.app was in the same state. I also deleted the downloaded firmware from the iPhone Storage screen in Settings, and rebooted. The firmware downloaded again and then failed to update - with the same symptoms.

Finally, I opened iCloud Storage and deleted a few hundred megs of data. A few seconds later, the phone alerted with the update countdown.

Steps to Reproduce:
1. Sign into iCloud on an iOS device running iOS 11 Beta 5. The iCloud account should have all of its storage used. (Backups, photos, etc.)
2. Open Settings.app -> General -> Software Update
3. Download the firmware update 
4. Wait...

Expected Results:
iOS should unzip the update and install it.

Observed Results:
The OS unzips the update and waits (Perhaps while it tries to do something in iCloud, perhaps related to offloading apps?)

Version:
iOS 11 beta 5 (Not sure how to find the build number - my device is on beta 6. I'm on the 3rd party developer train, if that helps.)

Notes:
I'd expect some sort of warning, alert, or feedback about what's going wrong, so I can choose to continue without whatever iCloud changes are happening, or at least to know what is wrong. Silent failure is not helpful. :-)

I tried to take a sysdiagnose, but I'm not sure if iOS captured it before updating. I'm syncing my device now and will upload if I see one that seems like it is from yesterday when I updated.

Also, thanks for taking the time to screen this radar. I'm sure you're under a lot of pressure with an impending Fall release and maybe a move to AC2. Good luck!

Configuration:
iPhone 6s, Verizon