Android 9 (“Pie”)

Huawei
unofficial

Notifications, background tasks, automatic synchronization or alarms do not work correctly for “Slack” on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Battery”.
  3. In the middle of the screen, tap on “App launch”.
  4. Find “Slack” in the list of apps.
  5. Next to “Slack”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  6. Tap on “Slack” again to turn the switch off, i.e. with its knob or handle to the left.
  7. A window with the title “Manage manually” should appear.
  8. Next to “Auto-launch”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  9. Next to “Secondary launch”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  10. Next to “Run in background”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  11. Tap on “OK”.
  12. At the top right, tap on ⋮ (three dots) to open the expanded menu.
  13. Choose “Manage manually”.
  14. Find “Slack” in the list of apps.
  15. Next to “Slack”, make sure there are three checkmarks in the checkboxes.
  16. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Phone Manager” or “Optimizer” on your device.
  2. At the bottom left, choose “Battery”.
  3. In the middle of the screen, tap on “App launch”.
  4. Find “Slack” in the list of apps.
  5. Next to “Slack”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  6. Tap on “Slack” again to turn the switch off, i.e. with its knob or handle to the left.
  7. A window with the title “Manage manually” should appear.
  8. Next to “Auto-launch”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  9. Next to “Secondary launch”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  10. Next to “Run in background”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  11. Tap on “OK”.
  12. At the top right, tap on ⋮ (three dots) to open the expanded menu.
  13. Choose “Manage manually”.
  14. Find “Slack” in the list of apps.
  15. Next to “Slack”, make sure there are three checkmarks in the checkboxes.
  16. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Phone Manager” or “Optimizer” on your device.
  2. At the bottom center, tap on “App launch”.
  3. Find “Slack” in the list of apps.
  4. Next to “Slack”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  5. Tap on “Slack” again to turn the switch off, i.e. with its knob or handle to the left.
  6. A window with the title “Manage manually” should appear.
  7. Next to “Auto-launch”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  8. Next to “Secondary launch”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  9. Next to “Run in background”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  10. Tap on “OK”.
  11. At the top right, tap on ⋮ (three dots) to open the expanded menu.
  12. Choose “Manage manually”.
  13. Find “Slack” in the list of apps.
  14. Next to “Slack”, make sure there are three checkmarks in the checkboxes.
  15. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Apps”.
  3. Tap on “Apps” again.
  4. At the top right, tap on ⋮ (three dots) to open the expanded menu.
  5. Tap on “Special access”.
  6. Choose “Battery optimization”.
  7. In the drop-down list at the top, switch from “Not allowed” to “All apps”.
  8. Find “Slack” in the list of apps.
  9. Tap on “Slack”.
  10. Select “Don’t allow”.
  11. Tap on “OK”.
  12. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Notifications”.
  3. In the bottom half, find “Slack”.
  4. Tap on “Slack”.
  5. Next to “Allow notifications”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  6. Next to “Display in status bar”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  7. Tap on “Lock screen notifications”.
  8. Select either “Show” or “Show but hide contents”.
  9. Next to “App icon badges”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  10. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Apps”.
  3. Tap on “Apps” again.
  4. Find “Slack” in the list of apps.
  5. Tap on “Slack”.
  6. Choose “Notifications”.
  7. Next to “Allow notifications”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  8. Next to “Display in status bar”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  9. Tap on “Lock screen notifications”.
  10. Select either “Show” or “Show but hide contents”.
  11. Next to “App icon badges”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  12. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open “Slack” on your device.
  2. Press ○ (“Home”) at the bottom of your device to go back to your home screen.
  3. Press □ (“Overview”) at the bottom of your device to open the overview of recently used apps.
  4. In the top-right corner of the entry for “Slack”, if there’s a lock icon, there’s nothing left for you to do. Otherwise, proceed with the next step.
  5. Tap and hold the entry for “Slack”.
  6. Move down the entry for “Slack” by swiping to the very bottom.
  7. Release the entry for “Slack” by lifting your finger again.
  8. In the top-right corner of the entry for “Slack”, there should be a lock icon now.
  9. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Wireless & networks”.
  3. Tap on “Data usage”.
  4. Choose “Smart Data Saver”.
  5. At the top, next to “Smart Data Saver”, make sure the switch is turned off, i.e. with its knob or handle at the left.
  6. Scroll down to the bottom half.
  7. Find “Slack” in the list of apps.
  8. Next to “Slack”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  9. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Battery”.
  3. At the bottom, tap on “More battery settings”.
  4. Next to “Power consumption alert”, make sure the switch is turned off, i.e. with its knob or handle at the left.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Press □ (“Overview”) at the bottom of your device to open the overview of recently used apps.
  2. Do not press the trash icon at the bottom. Remember never to tap on the trash icon here.
  3. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Phone Manager” or “Optimizer” on your device.
  2. At the top right, tap on the gear icon.
  3. Next to “Smart tune-up”, make sure the switch is turned off, i.e. with its knob or handle at the left.
  4. Next to “Auto-clean junk files”, make sure the switch is turned off, i.e. with its knob or handle at the left.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Wireless & networks”.
  3. Tap on “Data usage”.
  4. Choose “Network access”.
  5. Find “Slack” in the list of apps.
  6. Next to “Slack”, make sure there are two checkmarks in the checkboxes.
  7. At the very top, tap on the downward-pointing arrow (⌄ or ▾).
  8. Choose “Advanced network settings”.
  9. Find “Slack” in the list of apps.
  10. Next to “Slack”, make sure there are two checkmarks in the checkboxes.
  11. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Wireless & networks”.
  3. Tap on “Data usage”.
  4. In the bottom half, next to “Data usage this month”, tap on “More”.
  5. Using the tabs at the top, switch from “Day” to “Month”.
  6. Find “Slack” in the list of apps.
  7. Tap on “Slack”.
  8. Scroll down to the bottom half.
  9. Next to “Mobile data”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  10. Next to “Wi-Fi”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  11. Next to “Background data”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  12. Next to “Roaming data”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  13. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Battery”.
  3. Do not press “Optimize battery usage” at the top. Remember never to use “Optimize battery usage” here.
  4. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Apps”.
  3. Tap on “Apps” again.
  4. At the top right, tap on ⋮ (three dots) to open the expanded menu.
  5. Choose “Special access”.
  6. Tap on “Unrestricted data access”.
  7. Find “Slack” in the list of apps.
  8. Next to “Slack”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  9. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Apps”.
  3. Tap on “Apps” again.
  4. Find “Slack” in the list of apps.
  5. Tap on “Slack”.
  6. Choose “Permissions”.
  7. Make sure that all switches are turned on, i.e. with their knobs or handles at the right, unless you have any specific objections.
  8. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Apps”.
  3. Tap on “Apps” again.
  4. Find “Slack” in the list of apps.
  5. Tap on “Slack”.
  6. Choose “Data usage”.
  7. Scroll down to the bottom half.
  8. Next to “Mobile data”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  9. Next to “Wi-Fi”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  10. Next to “Background data”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  11. Next to “Roaming data”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  12. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Phone Manager” or “Optimizer” on your device.
  2. At the bottom center, tap on “Data usage”.
  3. Choose “Smart data saver”.
  4. At the top, next to “Smart data saver”, make sure the switch is turned off, i.e. with its knob or handle at the left.
  5. Scroll down to the bottom half.
  6. Find “Slack” in the list of apps.
  7. Next to “Slack”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  8. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Phone Manager” or “Optimizer” on your device.
  2. At the bottom center, tap on “Data usage”.
  3. Choose “Network access”.
  4. Find “Slack” in the list of apps.
  5. Next to “Slack”, make sure there are two checkmarks in the checkboxes.
  6. At the very top, tap on the downward-pointing arrow (⌄ or ▾).
  7. Choose “Advanced network settings”.
  8. Find “Slack” in the list of apps.
  9. Next to “Slack”, make sure there are two checkmarks in the checkboxes.
  10. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Phone Manager” or “Optimizer” on your device.
  2. At the bottom center, choose “Data usage”.
  3. In the bottom half, next to “Data usage this month”, tap on “More”.
  4. Using the tabs at the top, switch from “Day” to “Month”.
  5. Find “Slack” in the list of apps.
  6. Tap on “Slack”.
  7. Scroll down to the bottom half.
  8. Next to “Mobile data”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  9. Next to “Wi-Fi”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  10. Next to “Background data”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  11. Next to “Roaming data”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  12. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Phone Manager” or “Optimizer” on your device.
  2. At the bottom left, tap on the battery icon.
  3. Do not press “Optimize battery usage” at the top. Remember never to use “Optimize battery usage” here.
  4. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Battery”.
  3. Next to “Power Saving mode”, make sure the switch is turned off, i.e. with its knob or handle at the left.
  4. Next to “Ultra Power Saving mode”, make sure the switch is turned off, i.e. with its knob or handle at the left.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Phone Manager” or “Optimizer” on your device.
  2. Do not press “Optimize” in the middle of the screen. Remember never to use “Optimize” here.
  3. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Phone Manager” or “Optimizer” on your device.
  2. At the bottom left, tap on the battery icon.
  3. Next to “Power saving mode”, make sure the switch is turned off, i.e. with its knob or handle at the left.
  4. Next to “Ultra power saving mode”, make sure the switch is turned off, i.e. with its knob or handle at the left.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Apps”.
  3. Tap on “Apps” again.
  4. Find “Slack” in the list of apps.
  5. Tap on “Slack”.
  6. Choose “Storage”.
  7. Do not press “Clear data” or “Clear cache”. Remember never to use “Clear data” or “Clear cache” here.
  8. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Phone Manager” or “Optimizer” on your device.
  2. Do not press “Cleanup” at the bottom left. Remember never to use “Cleanup” here.
  3. If you really need more storage space on your device, we recommend deleting photos and videos that you don’t need anymore, or moving them to a different device or drive. In addition to that, consider uninstalling apps that require a lot of space, or managing the space inside of those apps, where possible.
  4. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Storage”.
  3. Do not press “Clean up” at the very bottom. Remember never to use “Clean up” here.
  4. If you really need more storage space on your device, we recommend deleting photos and videos that you don’t need anymore, or moving them to a different device or drive. In addition to that, consider uninstalling apps that require a lot of space, or managing the space inside of those apps, where possible.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Battery”.
  3. At the bottom, tap on “More battery settings”.
  4. Next to “Stay connected when device sleeps”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Phone Manager” or “Optimizer” on your device.
  2. At the bottom left, tap on the battery icon.
  3. At the bottom, choose “More battery settings”.
  4. Next to “Stay connected when device sleeps”, make sure the switch is turned on, i.e. with its knob or handle at the right.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Notifications”.
  3. Tap on “More notification settings”.
  4. Choose “Notification method”.
  5. Select either “Icons” or “Numbers”.
  6. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Display”.
  3. At the bottom, tap on “More display settings”.
  4. Next to “Display carrier name”, make sure the switch is turned off, i.e. with its knob or handle at the left.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. Open the “Settings” of your device.
  2. Choose “Accounts” or “Users & accounts”.
  3. At the top right, tap on ⋮ (three dots) to open the expanded menu.
  4. At the top, next to “Auto-sync data”, make sure there’s a checkmark in the checkbox.
  5. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. There are many apps on the app store which claim to boost performance, free up space, save battery, or optimize the RAM of your device. However, these apps interfere with other apps, like “Slack”, and prevent them from working correctly.
  2. If you have any app like “Clean Master”, “Security Master”, “Task Manager”, “Phone Cleaner”, “Super Cleaner”, “Power Clean”, “DU Cleaner”, “DU Speed Booster”, “CCleaner”, “AVG Cleaner”, “Avast Cleanup” or “Norton Clean”, check that it doesn’t block or terminate “Slack”.
  3. If unsure, consider uninstalling the app claiming to “clean” or “boost” your device.

Have you been able to follow these steps on Android 9 (“Pie”)?

  1. If you’ve made any changes based on the advice above and you’ve adjusted the settings of your device, proceed with the next step. Otherwise, there’s nothing left for you to do.
  2. Restart your device once. You can either choose the “Restart” option directly, if available, or turn off your device, wait a few seconds, and then turn it on again manually.
  3. Open “Slack” once on your device – by tapping on “Slack” on your home screen or in the list of all apps.
  4. Leave by pressing ○ (“Home”) at the bottom of your device.

Have you been able to follow these steps on Android 9 (“Pie”)?