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.
