We're trying to solve an issue where we need to detect when a "device" from the perspective from our app is actually a different one.
I was wondering if this was persisted to iCloud and iTunes backups, or if it is re-generated on device change?
identifierForVendor only changed when you Uninstall the application. once you install application then identifierForVendor will be same whatever task you perform like you update your application or you backup it to icloud or restore it, until you delete it. If you delete and reinstall the application then `identifierForVendor will be different!