If your Android phone isn’t showing notifications, you’re missing messages, or alerts only appear when you open the app, this guide walks you through the most common fixes. These steps work on all Android phones and focus on notification settings, battery optimization, and app permissions.
1. Check basic notification settings
Start by making sure notifications are enabled globally and for the specific app.
- Go to Settings → Notifications.
- Ensure Allow notifications is turned on.
- Scroll down and tap the app that’s not sending notifications.
- Make sure Allow notifications is enabled for that app.
If notifications are disabled at the app level, you won’t see any alerts.
2. Check Do Not Disturb and Silent modes
Do Not Disturb or silent mode can block notifications or mute sounds.
- Swipe down the notification shade.
- Make sure Do Not Disturb is turned off.
- Ensure the phone is not in Silent or Vibrate only mode.
Even with notifications enabled, Do Not Disturb can hide them.
3. Check in‑app notification settings
Many apps (like messaging or email apps) have their own notification controls.
- Open the app (Messages, WhatsApp, Email, etc.).
- Go to the app’s Settings → Notifications.
- Make sure alerts, sounds, and message notifications are enabled.
If in‑app notifications are disabled, Android can’t show alerts for that app.
4. Disable battery optimization for important apps
Aggressive battery saving can block background notifications, especially on some brands.
- Go to Settings → Battery or Battery & performance.
- Tap Battery optimization or similar.
- Select the app (e.g., messaging or email app).
- Choose Don’t optimize or No restrictions.
This prevents Android from killing the app in the background.
5. Allow background data and activity
If background data or activity is blocked, notifications may only arrive when you open the app.
- Go to Settings → Apps.
- Select the app.
- Tap Mobile data & Wi‑Fi (or similar).
- Enable Background data and Unrestricted data usage.
- Under Battery, allow Background activity if available.
6. Check lock screen notification settings
Notifications may be working but hidden on the lock screen.
- Go to Settings → Notifications → Lock screen.
- Choose Show all notification content or similar.
If set to “Don’t show notifications,” you won’t see alerts until the phone is unlocked.
7. Turn off “Adaptive notifications” or notification management apps
Some phones include features that automatically manage or suppress notifications.
- Go to Settings → Notifications.
- Look for options like Adaptive notifications or Notification management.
- Disable them if they are aggressively filtering alerts.
Third‑party “notification cleaner” apps can also silently block alerts — uninstall them if present.
8. Clear cache for the affected app
Corrupted app cache can sometimes interfere with notifications.
- Go to Settings → Apps.
- Select the app.
- Tap Storage → Clear cache.
This does not delete your data — only temporary files.
9. Update Android and the app
Notification bugs are often fixed in newer app or system updates.
- Open the Google Play Store → update the affected app.
- Go to Settings → System → System update and install any updates.
10. Test with another app
This helps determine if the issue is app‑specific or system‑wide.
- Send yourself a message from another app (e.g., SMS vs. WhatsApp).
- If one app works and another doesn’t, the problem is likely with that specific app.
11. When deeper troubleshooting is needed
If notifications still don’t work after all steps above, possible causes include:
- System‑level notification service corruption
- Severe battery optimization bugs
- Custom ROM or launcher issues
A factory reset