In most cases, a phone that won’t show notifications on the always on display has a settings issue, a permission problem, a power-saving limit, or an app restriction, and you can usually fix it without repair.
The always on display shows time, battery, and alerts while your screen stays off, so missing notifications can make you think the phone is ignoring them. This guide will help you check the right settings, test notifications, and find the most likely cause fast on your smartphone, whether the problem starts after an update, a battery change, or an app setting change.
Why notifications stop appearing on the always on display
When notifications disappear from the always on display, the cause is usually a setting, a battery rule, or a lock screen limit. Many phones still receive the alert, but they hide it before it reaches the screen you see when the display is off.
Different phones handle this feature in different ways. A Samsung One UI device may show more detail than a basic Android interface, while a Google Pixel or another smartphone may keep the display minimal for privacy or battery life.
The phone may be hiding notifications by design
Some phones only show the time, battery level, and a few small alert icons on the always on display. Others can show message previews, app icons, or richer lock screen details, depending on the model and software.
That difference matters. If your phone is built to keep the always on display simple, nothing is actually broken. The phone is following its default privacy rules.
Lock screen privacy settings can also change what appears. A phone may hide content until you unlock it, which means the alert arrives, but the text stays hidden. Manufacturer skins add another layer here, since Samsung One UI, Google Pixel software, and other Android interfaces often use different notification styles and privacy controls.
A quick way to check is to compare what shows on the lock screen, what shows on the always on display, and what appears after you wake the phone fully. If the notification appears only after unlock, the feature is probably limiting preview content rather than losing the alert.
Battery saver and sleep settings can block alerts
Power-saving modes often cut background activity to stretch battery life. That can stop the phone from refreshing notifications on time, or prevent the always on display from showing them at all.
Aggressive battery optimization can also delay alerts until the screen wakes fully. In that case, the notification is there, but it arrives late, which makes it look like the always on display missed it.
Pay close attention to settings like:
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Battery saver mode: This can limit syncing and reduce screen updates.
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Sleep or deep sleep app rules: These can keep certain apps from running in the background.
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Adaptive battery features: These may slow down apps the phone thinks you use less often.
If notifications appear only after you unlock the phone, battery rules are a likely cause.
This is common on Android phones that manage power aggressively. If the always on display feels inconsistent after a charge drop, a battery setting is one of the first things to check.
Notification permissions or app settings may be off
Sometimes the phone is ready, but the app never gets permission to show alerts on the lock screen. Message apps, email apps, and social apps are the most common places where this happens.
An app can lose access to:
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Lock screen notifications, which control whether alerts appear on the always on display.
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Banner alerts, which decide how the notification pops up.
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Preview content, which controls whether you see the message text.
This often happens after an app update, a system update, or a settings reset. For example, your email app may still receive new mail, but the phone hides the preview because notification access is turned off. The same can happen with messaging apps like WhatsApp, Messages, or Messenger, as well as social apps that send frequent alerts.
If one app is silent while others still show up, the problem is usually inside that app’s notification settings rather than the phone itself.
Check the always on display settings first
If phone notifications are missing from the always on display, start with the display settings before you change anything else. On many phones, the feature is already on, but the option to show alerts, icons, or message previews is turned off.
This check is often the quickest fix because brands label the setting in different ways. One smartphone may use “notifications,” another may say “show content,” and another may only offer “new alerts” or “icons.” A few taps here can make the difference between a blank screen and a useful lock screen display.
Turn on notification display in the always on display menu
Open the always on display or lock screen display menu and look for a setting tied to notifications. The wording changes by brand, but the right option often includes terms like notifications, icons, new alerts, or show content.
If you see a toggle for notification visibility, turn it on. Some phones also let you choose whether the always on display shows:
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Alert icons only, which gives you a small symbol for each app
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Notification titles, which shows the app or sender name
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Full content previews, which shows part of the message text
That difference matters. An icon means the alert arrived. A title means the phone identified the source. Full preview text means the phone is allowed to show the message itself.
If the always on display is active but still looks empty, the notification display toggle is one of the first settings to verify.
On some models, this setting sits inside Display, Lock screen, or Always On Display. On others, it lives under a separate Notifications menu. If the phone offers a search bar in Settings, search for “always on display” or “lock screen notifications” to get there faster.
Review lock screen privacy and content visibility settings
Privacy controls can hide notification text even when the alert is working. That means the phone receives the message, but it only shows a partial view on the lock screen or always on display.
Look for options such as hide sensitive content, show notification icons only, or do not show on lock screen. These settings can block message previews while still leaving small alert symbols visible. That is why you may see an icon for a text or email, but no sender name or message snippet.
The most useful way to check this is to compare three levels of display:
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Icons only show that an app sent an alert.
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Titles or app names show which app sent it.
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Full previews show part of the message content.
If your phone only shows icons, privacy settings are likely limiting the view. If it hides everything, the setting may be set to suppress lock screen content entirely.
Many Android phones and iPhones use separate controls for notification previews and lock screen access. So if the always on display is blank, check both the notification privacy menu and the lock screen display options. A phone can be set to protect content by default, which is useful for privacy but confusing when you want at-a-glance alerts.
Make sure the feature is enabled for the right apps
Some phones let you choose which apps can appear on the always on display. If that option exists, turn on alerts for the apps that matter most first, then review the rest later.
Start with the essentials:
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Phone and text apps, since missed calls and messages are easy to spot here
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Email apps, if you rely on work or personal mail
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Messaging apps, such as WhatsApp, Messages, or similar chat apps
After that, check social apps and work apps if you want those alerts on the screen too. It helps to begin with the apps you use every day, because they show whether the feature is working at all.
If one app appears and another does not, the phone is probably handling app permissions or notification categories separately. That is common on a smartphone, especially when one app is allowed to show lock screen alerts and another is not.
A quick app-by-app review can save time later. If the key apps are enabled here, you can move on knowing the always on display itself is set up correctly.
Fix notification settings that can interfere with the always on display
If the always on display is on but notifications still stay hidden, the problem is often inside your app alert settings. Many phones receive the notification, then block the preview, icon, or lock screen view before it reaches the screen.
That means you need to check both the phone settings and each app’s own alerts. A messaging app, email app, calendar app, or banking app can all behave differently, so one bad setting can make the whole phone look silent.
Allow notifications for the apps you need
Open each app’s notification settings and make sure alerts are turned on. On most phones, you can do this by going to Settings > Notifications, then selecting the app. If the app has its own settings menu, check there too, because many apps manage alerts in two places.
Start with the apps that matter most:
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Messaging apps like Messages, WhatsApp, or Messenger
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Email apps like Gmail or Outlook
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Calendar apps that send event reminders
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Banking apps, if you want login or payment alerts
For each one, turn on alerts, previews, and lock screen visibility if those options exist. If the phone only shows app icons on the always on display, that may be enough for some people. If you want message text or sender names, you need preview access too.
Some apps also let you choose how the alert appears. For example, an email app may allow banners, lock screen alerts, and sound separately. A calendar app may only need reminder alerts, while a banking app may hide sensitive content by default. Check those settings one by one so the app can show the right level of detail.
If one important app stays invisible on the always on display, its own notification permission is often the missing piece.
Turn off Do Not Disturb or use exception rules
Do Not Disturb can silence the display of alerts even when notifications still arrive in the background. In other words, the phone may get the alert, but it won’t show it on the lock screen or always on display.
Check whether Do Not Disturb is active in Quick Settings or under Settings > Notifications. If it is on, turn it off for testing. If you need it on, open the exception rules and allow the alerts that matter most.
Useful exceptions usually include:
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Calls from starred or favorite contacts
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Text messages from selected people
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Priority apps like phone, messages, or calendar
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Repeated callers, if you want urgent calls to break through
This helps if you want quiet hours without missing important alerts. A smartphone can stay silent and still show the right notifications later, but only if the exception list is set up correctly.
Check for silent notification channels or minimized alerts
Some apps split notifications into smaller groups, called notification channels. That sounds technical, but the idea is simple, one app can send different kinds of alerts, and each kind can have its own rules.
For example, a chat app may separate:
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Direct messages
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Group chats
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Mentions
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Promotional or account updates
One of those channels may be set to silent, minimized, or hidden. If that happens, the app still works, but the always on display may not show anything useful. This is common on Android phones, where the app can send one alert type to the lock screen and keep another type quiet.
Open the app’s notification settings and look for categories or channels. Then make sure the important ones are allowed to show on the lock screen and use a visible alert style. If a channel is muted, restore it to a normal alert level.
A simple way to test this is to send yourself a message, calendar reminder, or email after changing the settings. If one alert appears and another does not, the app is splitting its notifications and one channel still needs attention.
Use battery and background settings to let alerts come through
If notifications still don’t reach the always on display, battery rules are a likely reason. Many phones block background activity to save power, and that can stop alerts from showing up when the screen is off. The fix is usually to let your key apps run without limits, then test again.
Exclude important apps from battery optimization
Open your phone’s battery settings and look for a menu called Battery optimization, App battery usage, App sleep, or Background restrictions. The name changes by brand, but the goal is the same, keep important apps from being slowed down or paused.
Once you find the list, set your main apps to Unrestricted, Not optimized, or Allowed in the background. Focus on the apps that need instant alerts, such as messages, email, calls, calendar, and work chat apps.
A simple order helps:
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Open Settings.
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Tap Battery or Apps.
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Find Battery optimization or App sleep.
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Select your messaging and email apps.
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Change each one to allow background use.
If your smartphone uses deep sleep or sleeping apps, remove the same key apps from those lists too. A phone can still install and open an app normally while quietly limiting its alerts in the background.
If an app gets alerts only when you open it, battery optimization is often the reason.
Turn off aggressive power saving modes while testing
Power saver modes can reduce screen updates and delay notification syncing. On some phones, they also limit the always on display itself, so alerts may arrive late or not show at all.
Turn off Battery Saver, Power Saving Mode, or any similar setting for a quick test. Then send yourself a message or email and watch the always on display for a reply. If the alert returns right away, the power mode was getting in the way.
This test matters because power saving can affect a smartphone in two different ways. It may slow the app in the background, or it may reduce how often the display refreshes. Either one can make the phone look like it missed the notification.
If you want to keep power saving on later, check whether the phone offers an exception for notifications or always on display. Some devices let you keep the screen dim while still allowing alerts to come through.
Allow background activity for messaging and email apps
Notifications need background access to stay current. If background data or background refresh is blocked, the app may not check for new messages until you unlock the phone or reopen it.
Check both Wi-Fi and mobile data permissions. A messaging app should be allowed to use data in the background, even when the screen is off. On iPhone, look for Background App Refresh. On Android, look for Background data, Unrestricted data use, or similar controls.
Use this quick check for the most important apps:
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Messaging apps should be allowed to refresh in the background.
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Email apps should be able to sync over Wi-Fi and mobile data.
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Work apps should not be restricted by data saver settings.
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Social apps should be allowed only if you want those alerts on the always on display.
If alerts still lag, turn off Data Saver or any network restriction mode for testing. That setting can block background sync even when the app itself looks fine. After the test, restore any limits you want to keep, but leave the apps that matter most unrestricted.
A good rule is simple, if an app must wake you up, it should not be asleep itself.
When the problem is the phone itself, not the settings
If the settings look right and notifications still don’t show on the always on display, the issue may be the phone itself. Temporary system bugs, outdated software, and stuck notification services can stop alerts from reaching the screen even when every menu looks correct. In that case, a few device-level fixes often solve the problem faster than digging through more options.
Restart the phone and test with one app
A simple restart can clear short-term glitches in the operating system. When a phone has been running for days, background services can freeze, and notification delivery can get stuck. Restarting gives the system a clean start, which often restores the always on display without any deeper repair.
After the restart, test with just one reliable app. Messages or phone calls are the best choices because they are easy to control and easy to notice. If those alerts appear, the basic notification path is working, and you can narrow the problem to a single app later.
Keep the test simple:
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Restart the phone.
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Open one trusted app, such as Messages or the Phone app.
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Send yourself a test message or place a call to the device.
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Watch the always on display for the alert.
A clean restart can fix a temporary software lockup that looks like a notification problem.
Using one app at a time makes troubleshooting easier. If you test five apps at once, it becomes hard to tell whether the phone, the app, or the alert type caused the failure. A single app gives you a clear result.
Install the latest system and app updates
Software updates often fix always on display bugs, lock screen errors, and notification delays. If the phone is running older software, the problem may come from a known issue that the manufacturer already patched. This is especially true on a smartphone that recently started missing alerts after an update or a new app install.
Check for both operating system updates and app updates. The phone update may fix the display layer, while the app update may fix the notification code inside Messages, Gmail, WhatsApp, or another app you use every day. Both matter because alerts depend on the system and the app working together.
A good update check includes:
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System updates in the phone’s Settings menu
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App updates from the App Store or Google Play Store
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Carrier updates, if your phone shows one
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Restart after updates, so the changes take effect
After installing updates, test the same reliable app again. If the always on display starts showing notifications after the update, the issue was likely software-related. If nothing changes, move on to settings that affect only notifications or display behavior.
Reset only the settings that affect display or notifications
If the problem stays after a restart and updates, reset the settings that control notifications or display behavior before you try a full factory reset. That gives you a narrower fix and avoids wiping the whole phone too early. A full reset should be the last resort, not the first move.
Start with the settings most likely to affect the always on display:
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Notification settings, if alerts for some apps seem blocked
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App preferences, if the phone is hiding or silencing app alerts
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Display settings, if the always on display itself is acting oddly
Many phones offer a reset option for just one group of settings. That can restore default notification behavior without deleting your files, photos, or apps. It also helps if a hidden setting changed during an update or after a transfer to a new device.
If you still have the same problem after a targeted reset, then a broader reset may be worth considering. Even then, back up the phone first and check whether the issue affects one app or the whole device. That difference tells you whether the cause is inside the phone software or inside one specific app.
A factory reset can help, but it should sit at the end of the list. If your notifications fail across multiple apps after a restart, update, and targeted reset, the device needs a deeper check, and the next step is to isolate whether the problem is with the phone model, the software version, or the app itself.
Quick examples and a simple troubleshooting order that saves time
The fastest fix is usually the simplest one. Start with the settings that control what the always on display can show, then move outward to app alerts, power limits, and software updates. That order cuts wasted time because it checks the most common causes first.
A phone can receive notifications and still hide them from the screen you see when it sleeps. The goal is to find where the chain breaks, then fix that step only. On a smartphone, that often means one setting, one app, or one battery rule.
Best first checks for a Samsung-style always on display
On Samsung phones, begin with the lock screen and always on display menus. Check that notifications are allowed on the lock screen, then confirm the always on display is set to show alerts, icons, or content. If the display is on but the notifications are missing, this is usually the first place the problem appears.
Next, look at power settings. Power saving mode, adaptive power use, and app sleep features can limit how often the phone refreshes alerts. If the phone is trying to save battery, it may delay or hide notifications until the screen wakes fully.
After that, review the apps you care about most. Open the notification settings for Messages, Gmail, WhatsApp, or any app that matters to you. Make sure those apps are allowed to show on the lock screen and are not muted by a separate notification category.
A quick Samsung-style check looks like this:
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Lock screen notifications are turned on
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Always on display is set to show alerts
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Power saving is off for testing
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Key apps still have notification access
If one app works and another does not, the issue is usually inside the app settings rather than the phone itself.
Best first checks for a Pixel or other Android phone
Stock Android and near-stock Android phones usually keep the path simpler, but privacy settings matter more. Start with notification permission, then check whether the app is blocked from showing on the lock screen. Some phones hide content by default, so you may see the app icon without the message preview.
Do Not Disturb is the next thing to review. If it is on, notifications can still arrive, but they may stay out of sight on the always on display. Turn it off for a test, then send yourself a message or email to see whether the alert returns.
Battery settings matter here too. Open battery optimization, background restrictions, or any app battery menu and make sure the important apps are not restricted. A Pixel or other Android phone can look fine on the surface while silently limiting sync in the background.
Also check lock screen privacy. Look for settings that hide sensitive content or suppress previews. If the phone shows the notification after unlock but not on the always on display, privacy controls are a strong suspect.
The fastest order to follow when you are in a hurry
When time is tight, use the same order every time. That keeps you from jumping around settings and missing the real issue.
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Check the always on display settings and make sure notifications are enabled.
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Review the app notification settings for the apps that matter most.
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Turn off Do Not Disturb, then test again.
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Turn off battery saver or power saving mode.
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Restart the phone.
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Install any pending system or app updates.
This order works because it starts with the display layer, then moves to app alerts, then power controls, then system fixes. If the notification appears after one step, stop there. You do not need to keep changing settings once you have found the break.
If the alert shows after a restart, the phone likely had a temporary software glitch.
A simple example helps. If Gmail notifications appear on the lock screen but WhatsApp does not, check WhatsApp’s notification permission first. If no apps appear, look at the always on display and battery settings next. If nothing changes after those checks, update the phone and retest.
That short path usually finds the problem before you spend time on deeper settings.
Conclusion
A phone that cannot show notifications on the always on display usually has a setting blocking them, not a hardware fault. Once you turn on the right notification permissions, ease up battery saver, review privacy controls, and clear app restrictions, most phones will show alerts again.
If the display still looks empty, start with the always on display menu and test one message app first. That simple check usually shows whether the problem is in the phone, the app, or a hidden privacy setting on the smartphone.
The main fix is to match notification visibility with the way your phone handles lock screen alerts. Once that is set correctly, the always on display becomes useful again, instead of a blank screen with no context.