Overview
- Government agencies triggered sirens and sent a Cell‑Broadcast push alarm to mobile phones at 11:00 on Thursday, September 10, 2026, as part of the annual Warntag nationwide test.
- The BBK issued a first positive assessment after the exercise and at about 11:45 sent, for the first time in this drill, a reduced‑noise Cell‑Broadcast Entwarnung to signal an all‑clear.
- Despite broad multi‑channel reach through apps, radio and Cell Broadcast, many people did not receive the alarm or the Entwarnung because some phones lack Cell‑Broadcast support, had outdated operating systems or had blocking settings like airplane mode.
- The quiet Entwarnung used the lowest warning level (Warnstufe 3) and will only play with a device set to accept Warnstufe‑3 messages and running current software; otherwise phones may emit the standard loud warning tone.
- The BBK launched an online survey during the drill to gather public feedback, and it stressed that Cell Broadcast delivers messages without processing personal phone data as it refines technical settings and outreach ahead of future tests.