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#cellbroadcast
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Anders als in irgendwelchen Ländern Mitteleuropas *hust* 
*hust* wird das hier ab ner gewissen Stärke automatisch ins Wireless Emergency Alert System (CellBroadcast) eingespeist. Und ja, liebe Einrichtungen in, so kurz kann ein Wireless Emergency Alert sein. Dazu braucht's keine nichtssagende Wall-of-Text.
As part of or work on #Cellbroadcast we've documented our current test setup: https://codeberg.org/Phosh/gsm-cell-testing using #osmocom for the mobile network parts and #ansible for deploying #ModemManager on the devices, performing the tests and checking the results.
Thanks to @NGIZero for supporting our work on this.
Codeberg.orggsm-cell-testingGSM cell setup for testing mobile broadband
Oh, es ist offensichtlich Warntag in NRW.
Cell Broadcast ging nicht.
Aber NINA hat angeschlagen und mir die Warnung dank KDE Connect direkt auf den Desktop geschickt.
Lass ich gelten. Ich wurde gewarnt. Sirenen gab's ja auch.
Dass es bei bei Cellbroadcast-Warnungen extra die Kategorie "Testalarme" gibt, damit die Menschen einen Testalarm auch als solchen erkennen können? Das Fax scheint noch nicht beim deutschen Katastrophenschutz angekommen zu sein 
In #Hessen setzen wir beim Testen auf die beiden Gefahrenstufen "hoch" und "Extreme Gefahr" mit einem Text, der keinerlei Hinweis bzgl. eines Testalarms enthält. Sehr vertrauenswürdig!
Heute gibt es in NRW einen Probealarm - über Sirenen und Handys. Doch was, wenn das Smartphone am Warntag stumm bleibt?#Warntag #Probealarm #NRW #Handy #Smartphone #CellBroadcast #1332025
Warntag in NRW: Was tun, wenn mein Handy keinen Alarm schlägt?
Warntag in NRW: Was tun, wenn mein Handy keinen Alarm schlägt?
wdr.de · Warntag in NRW: Was tun, wenn mein Handy keinen Alarm schlägt?
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@MishaVanMollusq @Unixbigot reminds me of the #Ahr valley flooding which killed a lot of folks because none of the media and civil protection talked about it and #CellBroadcast was shutdown years ago...
My advice: Keep to it and ideally be ready to GTFO up hill / to the side on a minute's notice!
en.m.wikipedia.org2021 European floods - Wikipedia
Am 13. März findet zwischen 10:00 und 10:25 ein zusätzlicher #Warntag in #RheinlandPfalz statt. Die gesamte Meldekette, also auch #CellBroadcast, #Sirene o.Ä. wird getestet.
lfbk.rlp.deErster Landesweiter Warntag in Rheinland-Pfalz am 13. März 2025Am 13. März 2025 findet erstmals ein Landesweiter Warntag in Rheinland-Pfalz statt. Ziel ist es, die Warnsysteme zu testen, die Bevölkerung für Warnmeldungen zu sensibilisieren und die Abläufe im neuen Lagezentrum Bevölkerungsschutz im Landesamt für Brand- und Katastrophenschutz (LfBK) in Koblenz zu erproben.
@agx The initial #Cellbroadcast implementation for #ModemManager just landed. Thanks to the MM maintainers for the review and @NGIZero for supporting this project.
#phosh bits (and polishing the MM side) will follow soon.
Continued thread
Seriously, there's a reason why every other nation at the very least keeps the absolute minimum of bandwith necessary to maintain #2G & #3G service for #EmergencyCalling.
In fact, #Germany learned the hard way that #CellBroadcast and #PTY31 / #RDS - based #alarms and #sirens are not replaceable.
- It's frustrating to see that it took a triple-digit bodycount to get that across...
en.wikipedia.orgRadio Data System - Wikipedia
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@abuerkl also #CellBroadcast reaktivieren wie in #Deutschland???
Replied in thread
@aslmx You're incorrect - at least partially.
It was reactivated as until the late 2000s and early 2010s it was actually available in all 4 (back then!) major networks.
I remember it fondly because I did use the location feature offered in #Eplus's Network extensively...
AFAICT #CellBroadcast is only offered as a tunneled service in #4G & #5G networks, so the same issues of #VoLTE apply as *both 4G & 5G were designed for a premium mobile data service and not as a simple replacement of #2G and/or #3G...
Continued thread
And in #Germany it took a Natural Disaster with a triple digit bodycount for #CellBroadcast to be reactivated per legal mandate and #2G to remain online...
The fact that Telstra was unable to say how many devices roamed their Network should be seen as criminal incompetence cuz asking something like: "How many foreign devices are #roaming in your network?" is a standard #FAQ I'd expect them to put into their public financial reports - even as a #footnote re: #revenue [i.e. total devices, total revenue, average Calls / SMS / data per roaming device] cuz that's standard #metrics every #Telco & #ISP does create anyway...
de.wikipedia.orgHochwasser in West- und Mitteleuropa 2021 – Wikipedia
A #PSA for anyone living, staying, entering or even travelling to/from #Australia:
Apparently, #Australia decided to mandate it's #GSM systems to be shutdown because some #GalaxyBrainChair wanted to yeet #2G & #3G and demand everything to use #4G & #5G when in fact #VoLTE support is spotty at best and #EmergencyCalling oftentimes is explicitly hardcoded to not use #WIFIcalling or VoLTE as providing #triangulation and #LocationData via #SS7 is a desired feature when someone calls EMS, Fire Dept or the Police for help...
So essentially #tourists and anyone who hasn't an explicitly fully VoLTE-functional device they tested and verified to also do #EmergencyCalls via VoLTE are fecked with no reception when they need it the most!
This WILL KILL PEOPLE!!!
As much as we want to bitch about #GSM & #GPRS / #UMTS being #outdated and #inefficient, there are reasons to at least keep 2G available - ranging from lower power consumption to higher resilience in emergency situations.
#NewZealand for example does shutdown non-#EmergencyCalls during severe #Earthquakes so that people trapped and/or in need of urgent assistance can get through to dispatch operators and everyone else has to get in line and take a number aka. use #SMS or if existing #Internet to say "I'm fine!"...
If the Ozzies really need that juicy #UHF #SubGHz #Spectrum it's totally feasible to instead change the #allocations and reconfigure #CellularNetworks to use lesser bandwith for 2G (i.e. only keeping the absolute mininum of channels available for any service) and thus clear up space...
And to add insult to injury, Australia passed a #NorthKorea|n-alike #CellPhone #ImportBan for any device that doesn't do i.e. the bespoke proprietary garbage that i.e. #Telstra, #Vodafone and #Optus do with the #baseband modems of their #branded devices...
Seriously, which #TechIlliterate dickhead decided it's a good idea to do that #3Gshutdown in Australia without even a basic 2G network up and running at all?
- At least #Switzerland [AFAIK] still has #3G up and running (tho it would've been wiser to do it like #Germany and keep #2G as emergency fallback with it's functions like #CellBroadcast....
Weekly GNU-like #MobileLinux Update (37/2024): #libadwaita 1.6 and doas instead of sudo
LINux on MOBileWeekly GNU-like Mobile Linux Update (16/2025): Counting Easter EggsFuriOS update 13.0.9 adds Pipewire camera support (and other things), GNOME Clocks gains boottime alarms that work while suspended, Nemo Mobile demonstrates device locking on video, Sailfish OS Community News and a Ubuntu Touch Q&A, and way, way more. Enjoy!
Dieses Wochenende ist wohl der erste Echteinsatz des im Testbetrieb laufenden #Cellbroadcast Warnsystems in Österreich.
Heute war der erste #Warntag, an dem ich per #CellBroadcast informiert wurde. Schön. 
Was bei dem #Cellbroadcast Alarm übrigens ein katastrophales UIX ist, zeigt sich wenn du die Menschen in deiner Umgebung fragst, *was* das für ein Alarm war und welche Instruktionen gegeben wurden. Das konnten mir viele nicht beantworten.
Warum?
Es gibt bei den meisten Smartphones nur ein [Ok], die Meldung überdeckt alles, das Smartphone lärmt die ganze Zeit herum.
Was passiert also? Viele haben erschrocken die Alarmmeldung weggetipt, allein um Ruhe zu haben.
#CellBroadcast is now trending across Mastodon