VoLTE on the Xperia 10 II - filling in the gaps

I also haven’t figured out Telia EE yet, maybe they’re using the same configuration, except we don’t know which one works.

I’ve tried emt/est, telia/lv, generic but nothing has worked thus far.

Sony Xperia 10 II & T-Mobile in US

[root@sonyxperia defaultuser]# getprop persist.vendor.somc.cust.modem0
S264.8

Looking here: https://github.com/MarijnS95/SonyOpenTelephony/blob/master/ModemConfig/res/xml/service_provider_sim_configs.xml

Line 804:

2022-07-20_07-34

I presume that is the config file that I need to map to.

How do I create / extract /construct, the config file for T-Mobile US ?

Thanx

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You can use https://github.com/JohnBel/EfsTools to create Qualcomm modem config binaries. I don’t know if there will be signature or attestation issues though. For T-Mobile US the following works for now: VoLTE provider support - #110 by hackman238

I meant VoLTE and corrected it in my post.

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I am not sure if I understood the instructions for enabling VoLTE on X10II (single sim) correctly. The first step I did was pasting the following command to the console:

dbus-send --system --print-reply --type=method_call --dest=org.ofono /ril_0 org.ofono.IpMultimediaSystem.SetProperty string:Registration variant:string:auto

which gave me the following output:

Error org.freedesktop.DBus.Error.UnknownMethod: Method "SetProperty" with signature "sv" on interface "org.ofono.IpMultimediaSystem" doesn't exist

You did not. There are only two steps to enable VOLTE on 10II.

  1. Update to 4.4.0.68
  2. Toggle added to Settings → System → Mobile network to easily enable VoLTE

Should there is working config for your carrier it will work if not follow:
VoLTE on the Xperia 10 II - filling in the gaps

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Missed the 4.4.0.64 to 4.4.0.68 update, that explains it. Thanks.

With my Xperia 10 II I can register VoLTE and use phone calls / incoming calls successfully. But sending SMS is not working anymore.

I’m using a SIM card from 1und1 with the provider D2 Vodafone DE.

I have successfully registered in Polkomtel operator (Plus GSM) - Poland. However I had to manually create modem.conf.

  • getprop gave me S185.1, so I have created new directory with that name /vendor/oem/modem-config/
  • created modem.conf in/vendor/oem/modem-config/S185.1 with the following content “mcfg_sw/generic/euro/polkomte/vlvw/pl/mcfg_sw.mbn”

After that both voice and sms are working without problems while being connected to LTE network.

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how does that apply to 4G/VoLTE when roaming?

I have a X10ii and live in France with Orange as provider - VoLTE works fine at home.
I’m currently in the US, therefore roaming - T-Mobile is the provider I am on.

When doing steps 1 and 2, I see that my provider is still Orange, as I’m getting S11.3 and the modem.conf file contains:

mcfg_sw/generic/euro/orange/vlvw/fr/mcfg_sw.mbn

I tried using the workaround suggested here but unsurprisingly, since the value for me is S11.3 and it already exists, that did nothing.

So I’m not quite sure if I’m supposed to do something? Or is roaming just not taken into account at the moment?

Oops, I accidentally posted in the wrong thread. moving my issue here:

So, I tried to enable VoLTE with Salt (Switzerland), but it just won’t work. The config looks fine:

[root@Xperia10II-DualSIM defaultuser]# getprop persist.vendor.somc.cust.modem0
S32.1

The modem config is in /vendor/firmware_mnt/image/modem_pr/mcfg/configs/mcfg_sw/generic/euro/salt/vw/ch/ and is correctly set:

[root@Xperia10II-DualSIM defaultuser]# cat /vendor/oem/modem-config/S32.1/modem.conf 
mcfg_sw/generic/euro/salt/vw/ch/mcfg_sw.mbn

However, enabling VoLTE in the ‘mobile network’ settings just results in the dot blinking indefinitely, staying at status ‘Not registered’.
journalctl logs the following messages when I enable the setting:

Jul 24 08:36:43 Xperia10II-DualSIM ofonod[2755]: imsradio0 < 7 requestRegistrationChange
Jul 24 08:36:43 Xperia10II-DualSIM ofonod[2755]:   0000: 76 65 6e 64 6f 72 2e 71  74 69 2e 68 61 72 64 77    vendor.q ti.hardw
Jul 24 08:36:43 Xperia10II-DualSIM ofonod[2755]:   0010: 61 72 65 2e 72 61 64 69  6f 2e 69 6d 73 40 31 2e    are.radi o.ims@1.
Jul 24 08:36:43 Xperia10II-DualSIM ofonod[2755]:   0020: 30 3a 3a 49 49 6d 73 52  61 64 69 6f 00 00 00 00    0::IImsR adio....
Jul 24 08:36:43 Xperia10II-DualSIM ofonod[2755]:   0030: 0a 00 00 00 00 00 00 00                             ........
Jul 24 08:36:43 Xperia10II-DualSIM ofonod[2755]: imsradio0 > 4 requestRegistrationChangeResponse
Jul 24 08:36:43 Xperia10II-DualSIM ofonod[2755]:   0000: 76 65 6e 64 6f 72 2e 71  74 69 2e 68 61 72 64 77    vendor.q ti.hardw
Jul 24 08:36:43 Xperia10II-DualSIM ofonod[2755]:   0010: 61 72 65 2e 72 61 64 69  6f 2e 69 6d 73 40 31 2e    are.radi o.ims@1.
Jul 24 08:36:43 Xperia10II-DualSIM ofonod[2755]:   0020: 30 3a 3a 49 49 6d 73 52  61 64 69 6f 52 65 73 70    0::IImsR adioResp
Jul 24 08:36:43 Xperia10II-DualSIM ofonod[2755]:   0030: 6f 6e 73 65 00 00 00 00  0a 00 00 00 00 00 00 00    onse.... ........

Those do not look pretty helpful to me. Is there any log where I can find more information about what’s going on?

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It doesn’t look like there’s much else you can do on the SailfishOS side. Maybe contact Salt, or just leave it for a couple of days to see if it suddenly starts working.

Thank you so much for your experience, I am using 10 III and the paths for Polkomtel are slightly different.

devel-su
mkdir -p /vendor/oem/modem-config/S185.1
echo -n "/vendor/firmware_mnt/image/modem_pr/mcfg/configs/mcfg_sw/generic/EU/Polkomtel/VLVW/Poland/mcfg_sw.mbn" >> /vendor/oem/modem-config/S185.1/modem.conf

The weird thing is even after creating that and rebooting, I still can’t enable it. Any further steps I should do? I will wait and hope it will start working, I hope if X10II worked III will too, but this phone was never sold by them.

I don’t know if the same mapping can be done in case of xperia 10 III - I doubt that, but maybe someone else can shed some light on it . Nevertheless I suggest you to enable volte explicitly - if you haven’t done it already. It is done by sending SMS message ‘WlaczVoLTE’ to number 2601 (for postpaid) or by shord code *101*11*1317# (for prepaid).

Both xperia 10 II and III are not officialy volte supported phones by polkomtel according to their website. Xperia 10 II works with volte, so chances are the 10 III may also work.

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No, the X10iii doesn’t look at those modem.conf files at all to my knowledge. The choice of config is automatically selected internally by the modem. So messing with those on a III won’t do anything.

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Thank you a ton, now it works!
Also thank you @abranson, interesting!

Have you figured out which files are responsible for VoLTE on 10 mk II ? I would like to try to transfer files from 10II to the TAMA port for XZ 2 compact (works fine with android VoLTE) . I am grateful in advance .

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I got Elisa EE working with:
mcfg_sw/generic/euro/elisa/vlvw/est/mcfg_sw.mbn

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Elisa

Nice. I still haven’t gotten Telia EE to work.