Overview
- Effective November 25, 2025, the BBK enabled Entwarnungen that notify when a threat has ended via Cell Broadcast across Germany.
- All‑clear messages appear like alerts with the subject “ENTWARNUNG/ALL CLEAR,” are issued at warning level 3, and remain visible in the Bundeswarnportal for six hours.
- Users must enable level‑3 Cell Broadcasts on their devices to receive these notices, and sound or display behavior can differ by operating system.
- The feature follows joint testing with all mobile network operators and goes beyond requirements in the DE Alert guideline and EU public‑warning rules.
- Cell Broadcast sends anonymous, location‑based messages that retain reach under network load, complementing state alerts in use since February 2023.