OS-Specific Troubleshooting

1. Follow steps to troubleshoot for your issue.
   • Sending messages
   • Receiving messages
2. Follow steps to troubleshoot for your phone.
   • Phone-Specific Troubleshooting
3. Android phone's may have OS settings that limit notifications from appearing until you open Signal. Use the following steps as guidelines to navigate your OS settings.
   • Android 6
   • Android 7
   • Android 8 and higher

Android 6

1. Make sure all of Signal's permissions are granted.
   • Android Settings app > Apps & Notifications (depending on your device, this may look different) > Signal > App Permissions (depending on your device, this may look different) > Turn permissions on.
2. Confirm Signal is enabled to work when ‘Do not disturb’ mode is on.
   • Android phone Settings app > Sound > Do not disturb > Disable.
3. Check that Signal is excluded from battery optimization.
   • Advanced settings toolbar icon > Battery optimization > select 'All apps' > Signal > select 'Don't optimize.’ > Done > Restart your phone.
   • Android phone Settings > Apps > Advanced settings toolbar icon > Special access > Battery optimization > select 'All apps' > Signal > select 'Don't optimize.’
   • Android phone Settings > Battery > MENU > Battery optimization > select 'All apps' > Signal > select 'Don't optimize.’
   • Android phone Settings > Apps > Advanced settings toolbar icon > Ignore optimizations > select 'All apps' > Signal > select 'Allow.’
4. Enable background data.
   • Android phone Settings > Data usage > Cellular data usage > Signal > Background data > Enable Unrestricted data usage.

Android 7

1. Follow steps for Android 6 above.
2. Enable background data.
   • Android phone Settings > Data usage > Data saver > If data saver is disabled, stop here. If data saver is enabled go to Unrestricted data access > Enable Signal.

Android 8 and higher

1. Follow steps for Android 6 above.
2. Enable Signal to run in the background.
   • Android phone Settings > Apps > App Info > tap our app > Battery > turn on the 'Background activity' option.
   • Android phone Settings > Data usage > Data saver > If data saver is disabled, stop here. If data saver is enabled go to Unrestricted data access > Enable Signal.