The Federal Network Agency has paved the way for the introduction of a civil protection alarm system via mobile communications.
The authority published a guideline on Wednesday in which the technical details are regulated.
This means that in future the mobile phone networks can also be used to warn the population in the event of catastrophes and major accidents.
The so-called "cell broadcast" enables the authorities to send a warning to all mobile phone users who are currently in a certain area.
The warning works not only with modern smartphones, but also with simple cell phones.
The policy sees cell broadcasts as an "additional alert tool," not a replacement for apps like Katwarn or NINA.
The directive requires network operators to target all devices, not just their own customers' cell phones.
So if, for example, a Vodafone customer does not have a network at the moment, but is within range of a Telekom cell, you will receive a warning from this network operator.
The system also works with foreign SIM cards.
According to the Federal Ministry for Digital and Transport, the guideline will come into force on Thursday.
The mobile network operators must then install the cell broadcast technology in their networks within a year.
Fast implementation is right and important
"With the publication of the guideline, nothing stands in the way of introducing this new warning device in Germany," explained Jochen Homann, President of the Federal Network Agency.
After the flood disaster last summer, the call for an additional warning device became louder.
After heavy rain, numerous towns were flooded in mid-July.
183 people died, most of them in Rhineland-Palatinate.
As it turned out later, some affected communities had been warned about the disaster too late or not with sufficient urgency.
Federal Minister Volker Wissing (FDP) told the "Rheinpfalz" that the flood disaster had completely changed the lives of people in the affected regions.
“Everything must be done to better protect people in the event of a disaster.
It is therefore important and right that cell broadcast is now implemented quickly so that the population can be warned quickly and directly at any time.”