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  Waking Up the Dead: VoIP-Style Calling in React Native with Expo, FCM & Notifee Build a notification style incoming-call experience that wakes a locked Android device, rings continuously, and works even when your app has been terminated. Introduction If you've ever built a real-time alert application—whether it's a smart doorbell, home security system, emergency notification service, or ride-sharing platform—you've probably discovered that standard push notifications aren't enough. A typical notification banner can be missed, dismissed, buried beneath other alerts, or silently delayed by the operating system. When your use case requires immediate user attention, you need something closer to a phone call than a notification. What you actually want is a VoIP-style incoming call experience: The screen wakes up. The device rings continuously. The notification cannot be accidentally dismissed. Everything works even if the app has been completely killed. Achieving this ...