What to do if the connection to the desktop app or web client is slow or drops frequently?

The connection between the desktop app / the web client and the mobile device is usually stable. If you use an Android device and the connection is interrupted on a regular basis, please connect your computer and your mobile device to the same local network, if possible. Please also make sure that you are using the latest app version, and update the Threema app, if necessary.

Huawei/Xiaomi

On Huawei and Xiaomi devices, the OS closes the connection between the web browser and the Threema app. To prevent this from happening, please perform the following steps:

• Summon the Task Manager (by pressing the menu button on your device)
  
• Find Threema; Xiaomi: drag Threema downwards until the padlock icon appears
  
• Tap the padlock icon (the padlock icon will then turn into a closed padlock)

Please note: When using a Xiaomi device, you need to perform these steps again after a restart.

Should the problem persist, please run WebRTC Diagnostics, and send in the result:

• In Threema, open the main menu and navigate to Settings > About Threema > Advanced options > WebRTC Diagnostics, and tap Start
  
• Wait until the test is completed, and tap “Copy to Clipboard”
  
• Send the copied text along with a short description of the problem to the Threema ID *SUPPORT
  

We will then analyze the problem and get back to you as soon as we can.

OnePlus

Open the task manager, navigate to Threema, and tap the lock icon (which will close the lock).

Android 12 and later: To deactivate battery optimization for Threema, please proceed as follows:

• Open the system settings
• Go to “Battery”
• Scroll to “Threema”
• Activate the “Allow all background activity” option

Android 13 and later: To deactivate the “Adaptive Battery” option, please proceed as follows:

• Open the system settings
• Go to “Battery > Battery Saver”
• Tap “Adaptive Battery,” and deactivate the option

iOS

For connection issues with iOS devices related to the desktop app or the web client, please read this FAQ entry.