XDA-Developers forum member Jeremy Helling has created a way to move Angry Birds saved game data from one device to another. Rovio previously said they would look at a way of syncing saved-game data. The main clue was in the Angry Birds backups, which are available as apps under angrybirdsbackup, angrybirdbackup (seasons) and Rio backup (Rio) Helling’s first step is to purchase and install Angry Birds app on a new device, then complete the first level and create a backup.”]
Source: https://www.csoonline.com/article/2128441/hack-sets-your–angry-birds–saved-game-data-free.html