Quick post today, readers may remember that in the last post that the 112 test was today, so i hope you all set your alarms for this post!
imsd emergency calling works! end to end tested on the live network!
I called 112 in the designated time slot and had full two way voice with the operator, plus NAW data, sadly the AML did not work.
The Netherlands doesn’t use the text based AML my code had, ive send an email thanking them for the test and requesting information on the data based AML aswell as a possibility for a future second test when that works.
I do have to say that i can only say this works for the netherlands, i can tell the emergency path works in the modem and it took the genuine correct path, i can’t guarantee it. I’m not sure what the risk is that it works here but not elsewhere but i think its right to state this.
Before doing the first test i was so nervous with my phone hovering the call button but im glad it all worked out in the end, the operators were really kind too.
On the slight chance that any 112 operators happen to read this, Thank you very much!
LMAO
guess what just showed up in my company mailbox?
Hi,
I came across Catcrafts recently and have really enjoyed following the Fairphone 6 PostmarketOS work — the post on getting VoLTE calls with working audio was a great read, and the Epictetus quote was a perfect touch.
Mauricio here — I lead growth at Audioread. We loved Catcrafts so much that we turned it into audio, for free. Your last few articles are already narrated. Here’s “imsd 112 emergency calling end to end tested successfully! (Linux phone VoLTE)” read by our best premium voice:
Oh really, “Mauricio”, nice “—” you got there, wondered how these ended up in your totally hand written text because you enjoy my posts so much
we can even clone your voice, so the audio actually sounds like you reading it.
yeah no thanks.
I can’t make this up, it gets even funnier.
I downloaded their sample and put it on my server.
Seems like my instance doesn’t like audio, here’s the link:
https://catcrafts.net/media/30dcd0f90a71d861.mp3
Listen to 00:10
LOL! they didn’t bother to even just proofhear the generated audio! mauricio, you can fuck right off.
proofhear
OK, I’m officially too old for this shit.
Sounds like Anubis is working then? :D
lol. Don’t skip to the timestamp though! The build up made it funnier imo
Holy hell, that’s funny
Lmfao
I actually use the m-dash, when on my desktop. When using KDE it’s “alt gr + -” in the German keyboard layout.
Took a look and the layout seems to have hyphen and en dash—default—for
Alt Gr + -andAlt Gr + Shift + -, respectively, on both my regular layout and the German layout on my machine (added the German layout just to check). I wound up using the compose sequence of three dashes, but would prefer something with fewer strokes (and may do something about it—maybe).Same. But what’s Gr? I use Ctrl shift u + 2014
The alt key on the right side of the space bar has the letters “Alt Gr” on them
Cool, thanks!
an Alt Gr key to access a third level of key assignments.
I dunno, this sounded so badass. “Wir müssen tiefer gehen!”
Oh it’s nice you’re getting some recognition from what seems to be OH HELL NO
The pace with which you are knocking out issues is fantastic! Well done, makes me want a Fairphone 6.
Thanks a lot for what you’re doing - just ordered a Fairphone 6+ because of your work !!
I have just received word from Luca that the image is compatible with the 6+, please let me know know how it goes!
Will do, when the phone gets here in a week or two !!
Loving these updates and the work you are putting in. I just wish these phones weren’t so disgustingly expensive so that I could grab one and try it all out. Maybe in the future!
Awesome! Did you test this without a SIM inserted as well?
How does the test work? Do you give them their number or do they just allocate you in a slot where they think not much is going on anyway?
Really cool that they are doing this.
No i have not tried without a SIM, and im not sure that is possible
When asking for the test you need to provide the number you’re calling with, a SIM-less phone doesn’t have a number.
Maybe there is an option for it if you ask specifcally for a SIML-less test, but i had to provide a number.
I gave them the information and the date i wanted and they responded with this:
Beste Jorijn,
De testtijdvakken zijn van 9:15 en 10:15 of 13:30 en 14:15.
Graag hoor ik van je welk testtijdvak je wilt gebruiken.
Translation:
Dear Jorijn,
The test time slots are 9:15 and 10:15 or 13:30 and 14:15.
Please let me know which test time slot you’d like to use.
I don’t know how they got those slots, but pretty much yes, i gave them the info and they let me pick a slot.
Interesting, maybe a thing for the next test?
I assume they get some sort of identifier/metadata in emergency calls (IMSI?) in case no SIM is available?
Unless I completely forgot how telephony works a simless phone doesn’t have an IMSI either right?
They could see the IMEI maybe? Maybe you ment that.
Yep, IMEI was what I meant!
Donno about rest of the world but in EU mobile phones are required to not offer emergency calls without SIM cards. Phones or operators. Don’t remember. That’s due to way too many fake calls and problems with tracking them down.
I can only go by what my government tells me but I don’t think that’s true:
Der Europäische Notruf ist überall in der EU gebührenfrei verfügbar. […] Die Nummer kann im Notfall selbst bei gesperrtem Mobiltelefon – ohne Netzvertrag, SIM-Card, PIN oder Guthaben – kostenfrei gewählt werden.
Translation:
The European emergency number is available free of charge everywhere in the EU. […] The number can be dialed free of charge on a locked phone - without contract, SIM, PIN or credit.
Not that I regularily call them but my phone still shows “Emergency calls only” when no SIM is inserted.
Source: https://www.bundeskanzleramt.gv.at/themen/europa-aktuell/2026/02/europaeischer-notruf-112.html
Until 10 years ago it was totally possible. The emergency operator could see your IMEI, that you had no SIM, and which antenna was giving you coverage, but the network wouldn’t deny you the call. It was possible to get a legit 112 call that looked like it had no SIM because the phone had suffered damages during whichever accident prompted the call.
Actually the 112 service used to brag about being able to get your call in the most miserable scenarios.
in the us all phones have 911 access regardless of if thry are paying for any plan
SIM card in EU doesn’t need to be active. It’s enough to have one inside that was activated in the past.
what is NAW and AML?
NAW is the data the operator can get from the phone number, static data from the carrier subscription. It’s dutch for name, address, city.
AML is Advanced Mobile Location, a standard that allows your phone to send the GPS coordinates to the operator.
I wpold hope that if linux phones support AML that they have ways of disabling it.
Why so? IIRC it only sends to emergency services no?
I have no faith that ICE wouldn’t have access to the data from US dispatch offices
If I have understood correctly, it is only sent when you place an emergency call.
I think your concern should be more about the carriers sharing cell association data with them - as long as the phone is on, that can be used to track location pretty accurately.
But a toggle would be nice, I agree.
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