Filed as FB25408294 with sysdiagnose attached. After an Apple battery repair (Aug 28, 2026), my iPhone 15 Pro Max was reset and set up as new. Since then, Settings shows "Some iCloud Data Isn't Syncing." Resume Data Sync asks for my iPhone passcode, loads, then shows "Couldn't Sync iCloud Data" with only Cancel or Delete iCloud Data. iOS 27.2 developer beta Advanced Data Protection: OFF Messages in iCloud: 188 GB stored, but "0 messages" / "Not synced" Same error on my Mac; Apple Watch Ultra can't finish setup because of it Tried current and previous device passcode No Recovery Key or Recovery Contact I have NOT deleted any iCloud data and want to recover it rather than reset it. Is anyone from the iCloud / CloudKit / Keychain team able to look at the FB? Has anyone found a way to get a device back into the iCloud Keychain circle without resetting end-to-end encrypted data?

iOS 27.2 beta: "Couldn't Sync iClo… | Apple Developer Forums

iOS 27.2 beta: "Couldn't Sync iCloud Data" – Resume Data Sync only offers Delete (FB25408294)

Filed as FB25408294 with sysdiagnose attached.

After an Apple battery repair (Aug 28, 2026), my iPhone 15 Pro Max was reset and set up as new. Since then, Settings shows "Some iCloud Data Isn't Syncing." Resume Data Sync asks for my iPhone passcode, loads, then shows "Couldn't Sync iCloud Data" with only Cancel or Delete iCloud Data.

iOS 27.2 developer beta
Advanced Data Protection: OFF
Messages in iCloud: 188 GB stored, but "0 messages" / "Not synced"
Same error on my Mac; Apple Watch Ultra can't finish setup because of it
Tried current and previous device passcode
No Recovery Key or Recovery Contact

I have NOT deleted any iCloud data and want to recover it rather than reset it.

Is anyone from the iCloud / CloudKit / Keychain team able to look at the FB? Has anyone found a way to get a device back into the iCloud Keychain circle without resetting end-to-end encrypted data?