With the transition of Gigaset Communications GmbH to Gigaset Technologies GmbH, the development of the ContactsPush app was discontinued.
In the meantime, the app has been removed from the Apple Appstore and the Google Play Store and cannot be reinstalled. Devices that previously had this app installed can continue to use it until they no longer comply with any future guidelines of new operating system versions.
Unfortunately, we are unable to provide the software as an APK.