!Emergency calls not working!

Hanna

None of the emergency numbers are working (110 and 120) which is very critical and can be life threatening. I'm in China and I have a Chinese phone number. My provider is China Telecom.

Do I need "Shizuku" and "Pixel IMS" for emergency numbers to work? How do I call emergency services?

Please help.

de0u

Hanna Do regular non-emergency calls work? Exactly what happens when an emergency call is made? Which dialer program is in use?

Muz78

Hanna Do you have LTE-only mode enabled in your SIM settings? If so, that might be the reason. Calls don’t work in LTE-only mode if your carrier doesn’t support VoLTE calls.

In that case, try switching back to the setting "5G (recommended)"

To access the SIM settings, just type "SIM" in the settings search (with the phone set to English, I’m not sure about other languages). This can only be done from the owner profile.

https://grapheneos.org/usage#lte-only-mode

Hanna

de0u Thanks for the reply. No, normal calls dont work either since I'd have to set up Shizuku for that according to some posts on here and github.

After calling an emergency number I just lose signal. I need to reboot my phone again for the signal to come back.

Mobile data works without any issues and I have access to the internet without problems. Just calls don't work. Normal calls are not really important for me just emergency services are important. How do I fix that?

I use stock GrapheneOS (nothing changed). I'm using the GrpaheneOS dialer.

mrket

Hanna if your provider only supports VoLTE calls and there is no official support for Pixel phones, you will have to use Shizuku + Pixel IMS to enable VoLTE to make calls (GrapheneOS is the same as the stock OS in this regard).

de0u

Hanna No, normal calls dont work either since I'd have to set up Shizuku for that according to some posts on here and github.

If normal calls don't work because VoLTE is required and isn't working, I would not expect calls to emergency numbers to work either.

Is 2G calling enabled?

mrket

mrket I think it would be very good if GrapheneOS added some kind of override for this though, this is an issue that will be affecting more and more people worldwide as time goes on (many providers in my country don't support Pixels officially either), and Pixel IMS is not an ideal solution as it resets after every update and requires enabling developer options for Shizuku each time it is used.

I'm not an Android developer though, so I can't say how difficult it would be to implement and maintain.

Hanna

mrket What about if I remove my SIM card? Am I going to be able to place an emergency call?

Hanna

mrket Yeah right it baffles me how this doesn't have the highest priority possible. It can be a life threatening situation.

I saw some "official" accounts on github stating that it's the carriers fault and so on but to he honest there are other things to be smart about...
Emergency calls should be working without any issues. It should be non negotiable and the highest priority. Who cares about other calls, please just give us at least an emergency calls fix.
They probably don't care cause there are not enough Mainland China and HKSAR users.

I think the only feasable option is getting an iPhone or some cheap SIM less huawei second phone just for emergency calls... Crazy how a 1k$ phone can't call an ambulance or the police.

Hanna

Muz78 I've set it to 5G (recommended).

How do I even check if that's going to work? Also if I remove my SIM I don't have such a setting. Is an emergency call going to get through? It should be independent of the SIM?

I don't want to test call any emergency number.

Hanna

de0u Yes I guess. I have "2G network protection" disabled. That means I don't avoid 2G networks and that I'm using 2G right?

de0u

Hanna They probably don't care cause there are not enough Mainland China and HKSAR users.

I suspect there is also a practical issue: I suspect not many GrapheneOS developers live in the PRC (HKSAR or otherwise). More generally I suspect most GrapheneOS developers live in places where Google officially sells Pixels and thus don't have an opportunity to test against carriers that would require VoLTE forcing.

Muz78

Hanna If the mode was previously LTE-only and now you have "5G (recommended)", try checking if normal calls work. You could, for example, have someone nearby call you and then try calling them back to see if calling works.

Hanna

Muz78 Yeah thanks for the suggestion. It doesn't work because of thenisuee @Andromxda posted.

Andromxda

https://github.com/GrapheneOS/os-issue-tracker/issues/956

Hanna

Andromxda Yes thx for the link. I already saw this issue on github and that's the github issue I was talking about earlier in my messages. Now that I read it more carefully someone said they had to add the area code before calling 110 (an emergency number) which I didn't do.

Is there any way to know if this works without Shizuku and Pixel IMS since calling an emergency number should also work without a SIM card inserted/ without any carrier confgs? Anyone knowledgeable about the technical aspect of this?