Cell broadcast for emergency warnings in Germany - why is Android 11+ required?

Germany is preparing to use **cell broadcast messages for emergency warnings** issued by the government. A first country-wide test is planned for December 8, 2022 as part of the Nationwide Alert Day 2022 . Many publications claim that reception of these cell broadcast messages will only work under **Android 11 or newer**: * Warnsystem Cell Broadcast: Deshalb erhalten alle Handynutzer JETZT eine SMS von ihrem Provider * Cell Broadcast: Kaum kompatible Smartphones – Generalprobe verschoben * This discussion on XDA Forums also mentions problems: CellBroadcast and Emergency Warnings on Android - is it a mess? However, as far as I understand, the underlying technical standard is about 20 years old, and Android has supported cell broadcast for ages (since at least Jelly Bean / V4.1, release 2012). **So why should there be a problem with Android versions before 11?**