Since the App collects continuously in the Background data of contacts and comparisons with other Smartphone users in the vicinity, carries, consumes this action a lot of electricity. Therefore, the continuous background updating of the App on millions of phones with the Android operating system was automatically switched to "Off" – as long as the App was not open. Means: In this time, the App was able to send out any warning.

A spokesman for the Robert Koch Institute, admitted to the newspaper: "The automatic adjustment in the Background was suppressed by a part of Android Smartphones."

However, the bug should now be fixed, said the Ministry of health on "image"-question: In the Wednesday-supplied Version 1.1.1 the Problem is not anymore. A slider in the program point "- Priority background activity" let the App permanently activate.

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