Dear All,
We have two iPhone 15 at the moment, and both don't upgrade to iOS 26.6.1. One of them is currently on 26.4.2, the other one on is on 26.6
It always says "Unable to Verify Update. iOS 26.6.1 is temporarily unavailable. Try again later." This is going on for days now.
I have tried on our house WLAN, used my Google Pixel 10 pro as Hotspot and downloaded via that.
I have tried to connect one of the iPhone to our Macbook and do the update via Finder. It does download it, but then says "The iPhone "<iphone name>" could not be updated. Declined to authorize this image on this device for this user."
I have used different accounts. In the whole process, I have done factory resets numerous times, downloaded the updates numerous times, deleted the downloaded files after it failed and re-downloaded, factory reset again,…
What's also "funny": The size of the update seems to vary all the time and I had everything between ~400 MB and 9 GB (in the storage and update sections of the settings on the iPhone).
Why do we need the update so urgently? My daughter wants to upgrade from her iPhone 13, but I haven't managed yet to transfer the data from the old phone, because a current update doesn't run on the new phone, and any transfer attempt wants to have the update first.
Does anyone have any idea?
Best wishes,
Andre
Source: r/iphonehelp · by /u/andre_xs95