To activate Disney+, visit disneyplus.com/login/begin on your device. Enter the 8-digit code displayed on your TV or streaming device, then log in with your Disney+ account credentials. If you experience login issues, check your internet connection, clear browser cache, and ensure your app is updated. If the problem persists, try restarting your device or reinstalling the app. For account-related issues, resetting your password can also help. Disney+ customer support can provide additional assistance if needed to ensure a smooth login process.