Choose your preferred platform (Facebook, Google, or Apple) and follow the login prompts.
Your save data is now tied to your Facebook ID. Even if you switch from Samsung to iPhone, logging into Facebook inside the game will ask: "Do you want to load the previous save?" Answer YES. angry birds 2 save data
Symptom: You log into Facebook, and the game asks which save to keep, but both have different level numbers. Cause: You played offline on two different devices. Solution: Choose your preferred platform (Facebook, Google, or Apple)