The Corona warning app has, according to a report from image-Newspaper on millions of smartphones with Android operating system showed defects for weeks. Users of Samsung or Huawei phones, for example, were not warned or given too late, the newspaper reports. The reason is that the necessary constant background update of the app has been turned off automatically on the smartphones as long as it was not open. That should save battery power.

A spokesman for the software company SAP, which co-developed the app, told the newspaper: “There was indeed a problem with previous versions of the Corona warning app regarding background updates on Android devices.” The Robert Koch Institute, which publishes the app, also told the newspaper: “The automatic comparison in the background was prevented by some Android smartphones.”


The Ministry of Health said in the evening that the problem had been known for a long time and was also a topic in the app’s questions and answers (FAQ). There it is explained how the background update can be activated. At the same time, the authority emphasized that the app worked “at all times”. Certain Android devices would have prevented apps from running permanently in the background. “This applies not only to the Corona warning app, but to all apps on these smartphones.” The warning app also exchanges anonymous codes with other smartphones without this background update.

With the new version, which was released on Wednesday, “the problem is solved,” said the ministry. After the update, users would have to open the app once, go to Settings and activate the “prioritized background activity”.

The app is designed to help track and interrupt infection chains. It can also help people to get their test results digitally as quickly as possible after a corona virus test and can anonymously warn potential contacts via the app if they have installed the app.


Professor Hannes Federrath, President of the Gesellschaft für Informatik, spoke in the image– Newspaper of a very annoying mistake that could be “dangerous for the health” of the consumer. He also sees the blame on the smartphone manufacturers.