The unity document says "On iOS7 devices it will be UIDevice identifierForVendor or, if that fails for any reason, ASIdentifierManager advertisingIdentifier."
My game save the deviceUniqueIdentifier when creating save data.The game will check the whether identifier is matched or not. if not, I create a new save data to ensure that the save is not copied.
Since some players reported that the save data is missing on ios 7. I checked the document that the deviceUniqueIdentifier can be changed on the same device. The problem is that I need to know when does the deviceUniqueIdentifier change on ios 7 so I can make sure whether player lose save data is because of my seurity code.
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