- Why do I only receive messages once I open the app?
- Which Android version is required?
- Which permissions are used under Android, and for what purpose?
- Can I buy/use Threema without a Google account?
- Why does the synchronization not work anymore after rebooting my phone?
- How can I reinstall the app without any loss of data?
- Why can’t I update the app in the Google Play Store?
- Why do I keep getting asked for the Passphrase of the Master Key?
- What does the message “Master key is unlocked” mean?
- How can I save (media) files?
- What are distribution lists?
- What is notification priority?
- What are notification channels?
- How can I customize ringtones and notification sounds?
- Xiaomi: Why is no popup displayed and no sound emitted when new messages arrive?
- What happened to “Android Backup”?
- What happened to the camera’s features?
What are notification channels?
Starting with Android 8.0, apps are required to assign their notifications to so-called “notification channels”. These channels determine which signals (notification sound, light, vibration, etc.) incoming notifications trigger.
For privacy reasons, Threema doesn’t create a separate notification channel for each contact but one for each combination of notification settings. A channel’s ID is a hash of its notification settings.
Editing notification settings
Only edit notification settings for chats and calls in Threema (in Settings > Sound & Notifications or in a chat’s individual notification settings), not in the system preferences. Changes made in the system preferences will be lost.
If you use a Xiaomi device (including Pocophone) running MIUI 10 or later, please enable notification signals as outlined in this guide.