Board Thread:Questions and Answers/@comment-30531357-20161118003453/@comment-24659969-20161118031004

Depending on the backup size on itunes and the backup setting, it might or not backed up there. If I remember correctly, full system backup usually does include the app internal system data (including your save data), so you just have to redownload the game external data then goes to your gamecenter account to recover it.

If it is backed up in the gamecenter or itunes, usually you can start right away. But if you are restoring using inquiry code, the save data progress you got usually are coming from few days to a week ago since the inquiry backup happens only at periodically time.