Why notifications do not arrive on the locked screen on Android and how to fix it

Are you missing important messages because notifications are not shown on the locked screen of your smartphone? This problem occurs on devices Samsung, Xiaomi, Google Pixel and other brands with Android 10 and later. The reasons may lie both in system settings and in errors of specific applications.

In this article we will look at all possible reasons from basic privacy settings to hidden developer options. You'll learn how to check permissions for applications, configure the display of notifications on the lock screen, and even restore services Google Playif the problem lies there. And for advanced users, we have prepared instructions for working with ADB and energy saving settings.

Do not rush to reset the phone to factory settings - in 90% of cases the problem is solved in 5 minutes. Let's start with the simplest!

1. Checking basic notification settings on the lock screen

The first thing you need to do is make sure that the system is generally allowed to show notifications on the locked screen. In different versions of Android and shells (for example, One UI from Samsung or MIUI from Xiaomi) the path to these settings may differ, but the logic is the same.

Open Settings → Notifications → On the lock screen. Here you will see three options:

• 🔓 Show all notification text —the most open mode (the contents of messages are visible).
• 🔒 Hide sensitive content —only application icons and headers are shown.
• 🚫 Do not show notifications at all —complete disabling.

If you have the third option, just change it to the first or second. On some devices (for example Huawei), this option may be called Lock screen privacy.

⚠️ Attention: On devices with Android 12+ and corporate profiles (for example, through Microsoft Intune), the administrator can block the display of notifications on the lock screen. In this case, you will see the message “Managed by the organization” - contact your IT department.

2. Notification settings for specific applications

Even if general settings allow notifications to be shown, individual applications may be blocked. For example, WhatsApp, Telegram or Gmail often reset their permissions after updates.

How to check:

1. Go to Settings → Applications.
2. Select the problematic application (for example, Viber).
3. Tap on Notifications.
4. Make sure the switch Allow notifications is turned on.
5. Check the notification category (for example, "Messages" or "Calls") - it should be active.

On some phones (for example, Samsung Galaxy) there is an additional option Show as pop-up - this should also be enabled if you want see notifications on top of other windows.

If the application is not displayed in the list (for example, after resetting the settings), try:

• 📥 Reinstall it.
• 🔄 Launch and give all requested permissions (especially Display on top of other windows).
• 🔌 Enable autorun in the battery settings (more on this in the next section).

3. Battery optimization and background activity

Energy saving modes is one of the most common reasons why notifications do not arrive. Manufacturers (especially Xiaomi, Huawei and Oppoaggressively limit the background operation of applications to save battery.

How to fix:

1. Open Settings → Battery → Energy saving mode.
2. Make sure it is on Adaptive Mode or High Performance (not "Maximum Energy Saving").
3. Go to Battery optimization (or Background activity management).
4. Find the problematic application and select No restrictions.

On Xiaomi additional check:

• 🔋 Settings → Applications → Manage applications → Autorun —enable for the desired application.
• 🔄 Settings → Applications → Permissions → Show pop-ups.

Brand	Path to energy saving settings	What to enable
Samsung	Settings → Device care → Battery → Background restrictions	Add application to "Never" not sleeping"
Xiaomi/Redmi/POCO	Settings → Battery → Selecting battery mode	Disable "MIUI Optimization" for the application
Huawei/Honor	Settings → Battery → Launching applications	Enable "Autostart" and "Secondary launch"
Google Pixel	Settings → Battery → Adaptive battery	Disable adaptive restrictions for the application

⚠️ Attention: On some phones (for example, Realme or Oppo) there is a function Deep optimization. If it is enabled, notifications may not be received even when the screen is unlocked. Disable it in Settings → Battery → Deep optimization.

4. Problems with Google Play services

If notifications do not arrive all applications (for example, both Telegramand Gmail), the problem may be in Google Play services. They are responsible for delivering push notifications through Firebase Cloud Messaging (FCM).

How to diagnose and fix:

1. Check whether the Internet (Wi-Fi or mobile data) is turned on.
2. Open Settings → Applications → Google Play Services.
3. Tap on Storage → Clear cache.
4. Restart phone.
5. If it doesn’t help, update Google Play Services in Play Market.

For advanced users: check the FCM status via ADB:

adb shell dumpsys activity service FirebaseInstanceIdService

If the response contains errors like INVALID_SENDER or SERVICE_NOT_AVAILABLE, try:

• 🔄 Re-register the FCM token (reinstall the problematic application).
• 📡 Enable Background data transfer in the SIM card settings.

5. Conflicts with third-party applications

Some applications (especially task managers, antiviruses and optimizers) may block notifications. For example:

• 🛡️ Clean Master, CCleaner —aggressively close background processes.
• 🔒 Avast, Kaspersky —can block notifications as “suspicious activity.”
• 📱 Greenify, Battery Doctor —forcefully puts applications to sleep.

How to check:

1. Start the phone in safe mode (hold the power button → "Safe Mode").
2. Check whether notifications are being received. If so, third-party software is to blame.
3. Uninstall suspicious applications one by one, testing notifications after each one.

Critical information: Some phones (for example, Samsung s One UI 5.0+) have a built-in antivirus McAfee blocks notifications from unknown sources. Disable it in Settings → Biometrics and security → McAfee.

6. Resetting notification settings and extreme measures

If all else fails, try reset notification settings to factory settings:

1. Open Settings → System → Reset settings.
2. Select Reset notification settings (do not confuse with a full reset!).
3. Confirm the action.

After reset:

• 🔄 Reboot your phone.
• 📱 Go to each important application and allow notifications again.
• 🔋 Check your energy saving settings (see section 3).

If the problem persists, there are two options:

1. Firmware update - check for updates in Settings → System → Software update.
2. Factory reset settings - last resort, make a backup copy first!

FAQ: Frequently asked questions about notifications on the lock screen

❓ Why do notifications arrive with a delay?

This is a typical problem when active power saving mode or poor Internet connection. Check:

• Settings Battery optimization for the application (see section 3).
• Wi-Fi/mobile network connection stability (try switching to 4G instead of Wi-Fi).
• Background data activity in Settings → Mobile network → Background data.

❓ How to enable notifications for a specific chat in Telegram?

In Telegram you can configure notifications separately for each chat:

1. Open the desired chat.
2. Tap on the chat name → Notifications.
3. Select Enable and configure sound/vibration.
4. Make sure that the Telegram Settings → Notifications and sounds item is enabled Show notifications.

❓ Why do only icons and not text appear on the lock screen?

This means that the mode is enabled hiding sensitive content. Fixed in:

• Settings → Notifications → On the lock screen → Show all text.
• Or in the settings of a specific application (for example, WhatsApp → Notifications → Show text on the screen locks).

On Samsung Also check Settings → Lock screen → Widgets and notifications → Notification style.

❓ Is it possible to set notifications only for certain contacts?

Yes, many messengers support this function:

• WhatsApp: Open chat → ⋮ → Notifications → Custom notifications.
• Viber: Chat → ⋮ → Information → Notifications → Sound and vibration.
• Android Messages: Chat → ⋮ → Details → Notifications.

In the system settings (Settings → Notifications → Advanced) you can also enable priority notifications only for selected contacts.

❓ Why did notifications stop working after updating Android?

Updates often reset permissions or change the logic of notifications. Try:

1. Clear cache Google Play Services (see section 4).
2. Restart the phone.
3. Re-grant all permissions to problematic applications.
4. Check if new items have appeared in Settings → Notifications (for example, Notification channels in Android 13+).

If the problem persists, contact the manufacturer's support - in new versions of Android there may be bugs.