Android version 6.0.1+

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For devices running Android version 6.0.1 and newer, check that your battery optimization is not preventing Slack from sending you notifications:

1. From the app drawer, tap Settings.

2. Select Battery.

3. Tap the  Overflow menu icon and choose Battery Optimization.

4. Tap the downward caret and choose All apps.

5. Tap Slack, then tap Don't optimize.

 

Android version 7+

1. From the app drawer, tap Settings.

2. Select Apps.

3. Find and tap Slack.

4. Select Battery, then tap Battery Optimization.

5. From here, select Apps not optimized option and change it to All apps.

6. Find Slack in this list and set to Don't optimize.

 

 

Android version 9

For devices running Android version 9, make sure the Adaptive Battery feature is not preventing Slack from sending you notifications:

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1. From the app drawer, tap Settings.

2. Select Battery.

3. Choose Adaptive Battery.

4. Tap Restricted apps, and make sure Slack is not listed.

 

Third-party apps

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Clean Master

This third-party app manages battery saving and RAM.

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1. Visit the app's Tools tab.

2. Select the Notification Cleaner.

3. Tap the  gear icon.

4. Disable this feature for Slack only, or for all notifications.

 

Security Master

This third-party security app may be blocking Slack from sending notifications:

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1. Visit the app's Notification Cleaner.

2. Tap the  gear icon.

3. Ensure that Slack is unchecked and listed under Apps - Notifications Allowed.

 

Note: In some cases, you may need to uninstall the app in order to receive mobile notifications.

 

 

Android device models

Below is a list of Android devices and models known to have issues with Slack notifications.

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Asus Zenfone (Android 7.0)

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Step 1: Ensure that Slack is set to auto-start

1. From the app drawer, tap Settings.

2. Tap Power Management.

3. Select Auto-start Manager.

4. Find Slack and ensure it's enabled.

 

Step 2: List Slack as a protected app

1. From the app drawer, tap Mobile Manager.

2. Tap Boost.

3. Tap Enable Super Boost, then select Protected app list.

4. Verify that Slack is on the list.

 

 

Asus Zenfone 2

Make sure that Slack is allowed to begin on startup from your Auto-start manager:

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1. From the app drawer, tap Apps.

2. Tap Auto-start manager.

3. Toggle Slack to Allow.

 

 

Huawei Honor 6

Step 1: List Slack as a protected app

1. From the app drawer, tap Settings.

2. Tap Power Saving.

3. Tap Protected apps.

4. Toggle Slack to enable.

 

Step 2: Enable Slack in the Notification Manager

1. From the app drawer, tap Settings.

2. Tap Notification Manager.

3. Select Notify for Slack to receive push notifications.

 

 

Huawei Honor 8

Step 1: List Slack as a protected app

1. From the app drawer, tap Settings.

2. Tap Advanced Settings.

3. Tap Battery Manager.

4. Tap Protected apps (or Close apps after screen lock).

5. Toggle Slack to enable.

 

Step 2: Ignore battery optimizations for Slack

1. From the app drawer, tap Settings.

2. Tap Apps.

3. Tap Advanced.

4. Select Ignore battery optimizations.

5. Choose Slack and ignore the app.

 

Step 3: Allow notifications from Slack

1. From the app drawer, tap Settings.

2. Select the Notification Panel & Status Bar.

3. Tap Notification Center and find Slack.

4. Ensure that Allow Notifications and Priority Display are active.

 

 

Huawei P8 lite

Step 1: Enable Slack to run at startup

1. From the app drawer, tap Phone Manager.

2. Swipe left and tap Startup Manager.

3. Tap Slack and ensure that it's set to run automatically at system startup.

 

Step 2: Allow notifications from Slack

1. From the app drawer, tap Phone Manager.

2. Swipe left and tap Notification Manager.

3. Tap Rules and ensure that Slack is set up to send notifications to the notification panel. Check if any other settings in this view may be blocking notifications.

 

 

Huawei Mate 8 & Huawei Nova Plus

Ensure that Slack is exempt from your device's battery optimization features:

1. From the app drawer, tap Settings.

2. Tap Advanced Settings.

3. Tap Battery Manager.

4. Tap Protected apps.

5. Toggle Slack to enable.

 

 

LeEco/LeTV

Step 1: Enable Slack to run at startup

1. From the app drawer, tap Settings.

2. Tap Permissions.

3. Tap Manage Auto Launch. If you have enabled other apps to auto-launch, you'll see You've enabled [x] apps to auto launch.

4. Toggle Slack to enable.

 

Step 2: List Slack as a protected app

1. From the app drawer, tap Settings.

2. Select Battery, then tap Power saving management.

3. Select App Protection.

4. Toggle Slack to enable.

 

Note: If you have enabled Lock Screen Cleanup and Ultra Long Standby during Sleep, you must disable them to allow Slack notifications.

 

 

Lenovo

Enable the auto-start setting for the Slack app:

1. From the app drawer, tap Settings.

2. Tap Power Manager.

3. Select Background app management.

4. Toggle Slack to Allow auto-start.

 

 

OnePlus (Android 7.0 and earlier)

For system versions earlier than Android 8.0 Oreo, ensure that Slack is set to auto-launch:

1. From the app drawer, tap Settings.

2. Tap Apps.

3. Tap the  gear icon in the top right.

4. Select App Autolaunch.

5. Toggle Slack to enable.

 

 

OnePlus (Android 8.0 and later)

Step 1: Check that app storage is set to clear normally

1. From the app drawer, tap Settings.

2. Tap Advanced.

3. Select Recent apps management.

4. Ensure that Normal clear is enabled.

 

Step 2: Exclude Slack from battery optimization

1. From the app drawer, tap Settings.

2. Tap Battery, then Battery Optimization.

3. Tap Apps not optimized and select All apps.

4. Find Slack and ensure it's set to Don't optimize.

 

 

OnePlus 3

Adjust your battery optimization to allow notifications from Slack when it's running in the background:

1. From the app drawer, tap Settings.

2. Tap Battery.

3. Select Battery Optimization.

4. Tap the  Overflow menu in the top right of that screen.

5. Select Advanced Optimization.

6. Toggle Slack to off.

 

 

OPPO

Step 1: List Slack as a protected app

1. From the app drawer, tap Settings.

2. Tap Advanced Settings.

3. Tap Battery Manager, then Protected Apps.

4. Toggle Slack to enable protection.

 

Step 2: Ignore battery optimization for Slack

1. Tap on Settings.

2. Select Battery, then tap on Energy Saver.

3. Find Slack and ensure that Freeze when in Background, Abnormal Apps Optimization and Doze are all disabled.

 

Step 3: Allow notifications from Slack

1. From the app drawer, tap Settings.

2. Tap Notification Panel & Status Bar.

3. Tap Notification Center.

4. Find Slack and activate allow notifications and priority display.

 

Step 4: Add Slack to start up manager

1. Open the Security app. 

2. Select Privacy Permissions, then Start up manager.

3. Find Slack and ensure this setting is enabled.

 

 

Samsung

Step 1: Prioritize notifications from Slack

1. From the app drawer, tap Settings.

2. Tap Apps.

3. Select Slack.

4. Under App Setting, tap Notifications.

5. Toggle on Set as priority.

 

Step 2: Exclude Slack from battery optimization

1. From the app drawer, tap Settings.

2. Tap Device management.

3. Select Battery.

4. Tap Unmonitored apps.

5. Add Slack to this list.

 

 

Xiaomi

Check that Slack is given permission to autostart:

1. From the app drawer, tap Security.

2. Tap Permissions.

3. Tap Autostart.

4. Toggle Slack to enable.