Nokia 5 (2017): Fix Apps Closing in Background & Missing Notifications

Disable Battery Optimization

• 💡 To prevent apps from sleeping and ensure notifications are received, disable battery optimization for specific applications.
• 📌 Navigate to Settings > App notifications > Special app access > Battery optimization, select 'All apps', find your app, and choose 'Don't optimize'.

Manage Nokia Power Saver Service

• ⚙️ On Android 9 (Pie), the 'Power saver' service can aggressively close apps. To manage this, go to Settings > Battery > Battery saver and disable it.
• ⚡ For a more direct approach, force stop the system app 'Power saver' (package name: com.android.power_saving) via Settings > Apps > (three dots) Show system > Power saving > Force stop.
• ⚠️ Be aware that the Power saver service may restart automatically, requiring occasional re-force stopping.

Adjust Developer Options

• 🚀 Enable Developer options by tapping the 'Build number' seven times in Settings > About phone.
• 🔍 Within Developer options, find and adjust the 'Background process limit' to 'Standard limit' to prevent Android from excessively restricting background apps.
• ✅ Ensure 'Don't keep activities' is disabled to allow apps to run in the background.

Avoid Task Killer Apps & Update Software

• 🚫 Do not install third-party task killer, RAM booster, or battery booster apps, as they can exacerbate the problem of apps closing.
• 🔄 Keep your Nokia 5 software updated. System updates often include bug fixes and improvements for background app behavior and notification delivery.

Advanced and Workaround Solutions

• 💡 For critical apps, enable 'Foreground service' or 'Run in background' options if available within the app's settings, which can help keep them alive by maintaining an ongoing notification.
• 🛠️ Advanced users can permanently disable the Nokia Power Saver service using ADB commands (ADB shell PM disable-user com.android.power_saving) via a PC, which will rely solely on Android's native battery management.
• 📊 Allowing apps to run freely might slightly impact battery life, so it's recommended to only exempt essential applications.