As long as your account is already bound (not a guest account), simply download the game on your new device and log in using the same method as before (e.g., the same WeChat/phone number/Google account). Your game progress will sync automatically.
Make sure your network connection (Wi-Fi or 4G/5G) is stable. Try lowering the graphics settings in the game, such as reducing the image quality, frame rate, and other visual options.
No. To ensure account security, the same account can only be logged in on one device at a time. When you log in on a new device, the account on the original device will automatically log out.
Check if your phone has a stable internet connection and enough storage space for the update. Clear the cache of your app store and try again.