Question regarding modem

[dcinoz]

Hello Anton,

I have the same Problem after "updating" the Modem Firmware on 25.08.2021.

Hi Walter, 

From which modem firmare version did you update to which version?

The problem only occurs on my pinephone with the modem firmware version 01.002.01.002 whereas
the pinephone with firmware version 01.001.01.001 does send SMS messages without any problem.

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Let us know.

After the discovery that immediately after restart the IMS/VoLTE status is 1,0 for some time (before it becomes 1,1) and that immediately after restart the phone can send at least one text message (see above),

I checked the IMS/VoLTE status on my other, flawlessly working pinephone:

It's 1,0!

So setting it from 1,1 to 1,0 might indeed solve the problem.

How would you do that?

And, in case this works: How can the status be changed permanently?

Hi,

Weird that 3G only doesn't work as IMS is not involved, that shouldn't be happening (neither with 2G if that still works where you are).
And it works fine with a non-Pinephone?

I just realised the IMS off command is incorrect.....sorry!

You need to issue

Code:

mmcli -m any --command='AT+QCFG="ims",2'

to disable IMS function. 0 means it is set by the MBN (IMS profile) file, 1 means enable IMS function, 2 disable the IMS function.

Check whether it has worked using:

Code:

mmcli -m any --command='AT+QCFG="ims"'

Answer:
response: '+QCFG: "ims",2,0'
is what you are looking for. If it stays at 2,1 then try the command 'AT+CFUN=1,1' though I don't know if it's needed.

For 4G, I've read this: https://www.3gpp.org/news-events/1268-Di...-LTE-Myths
and so for 4G only there are 2 possibilities, without IMS working and with IMS working, so you should try both cases.

For IMS enabled I don't know whether the answer:  '+QCFG: "ims",1,1' meaning VoLTE is ready means that SMS over IMS is enabled as that may depend on the 'profile' you have selected / the modem has.

Code:

mmcli -m any --command='AT+QMBNCFG="List"'

will list the profiles on the modem (not sure what the open source modem has on it), you are looking for number,1,1 for the one that is selected.
The post on O2 Germany said use ROW_Commercial I believe so you would need:
response: '+QMBNCFG: "List",x,1,1,"ROW_Generic_3GPP",0x05040820,202009031 (x=0 for me)

Test in 4G mode only, not sure if it might try to send SMS over 3G, it should switch to 3G for calls if VoLTE is not ready (and not work for calls if 4G only and VoLTE is disabled).

I thought there might be easy logs to get from journalctl but I couldn't find anything explicit about an incoming SMS on my phone. Using the AT command as mentioned in a previous post is probably the easiest to see the modem response.

If you don't get anywhere after trying the above, I suggest logging a bug report on Mobian https://gitlab.com/mobian1/issues to see if the experts can help with debugging via logs.

On the IMS side I would say that I don't know that ROW_Commercial is guaranteed to work (that would be too easy) though another poster had it working for them so it should work for you too (unless the SIM / network has to be activated?). You do need a specific profile provided by your operator normally so there are no guarantees. I tried loading an Android one to the modem and though the file transfer was successful it was not recognised as an MBN file, unfortunately.

Good luck!