VoLTE on Fairphone 4 with /e/ with Vodafone germany

Help Fairphone 4
27

That is odd: if Wi-Fi as it has to connect to be enabled. To then it gets disabled whilst showing it is available ??

So is this just a Vodafone Germany thing, again. Are you able to use someone else SIM on a different network to see that Wi-Fi calling works as expected.

28

It may still be an iodéOS thing… :wink:

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29

It may still be a LOS 19.1 thing… :wink:

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30

I know that Wi-Fi Calling isn’t available with SIMon. I just wanted to confirm that the missing VoLTE option is not limited to other OS but also with the stock OS on FP4.

I tried that IMS thingy and whether I have the Wi-Fi Calling enabled or disabled, the IMS Status reads “Voice over LTE: Available”

So not sure if it is available only or actually enabled.

31

Not quite sure if all this is due to missing config files in /data/vendor/modem_config/mcfg_sw/generic/
@Ray-Ven Is there a file /data/vendor/modem_config/mcfg_sw/generic/EU/Vodafone/VoLTE/Germany/mcfg_sw.mbn on your phone?

I’ve got the file for Vodafone on LineageOS, but @AlphaElwedritsch already mentioned that VoLTE with Vodafone worked for him on a LOS 18 based ROM. I’m missing something similar for my provider Telefonica, so that leads me to the conclusion it could be the cause.

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32

hmm. My phone isn’t rooted. I couldn’t even access it with adb (debugging on) :frowning:
any suggestions?

33

So we have to wait for any user of a rooted /e/os device to have a look. I tried to extract the files from the newest Fairphone image, but it seems they are getting generated in the install process (or are stored at some place I have not found yet).

34

To answer your question:

  • I want to be able to surf while a call
  • VoWiFi and VoLTE are using the same technique, so VoWiFi won’t work too
  • VoWiFi makes it possible to make calls in areas were’s no reception
  • Soundquality can be way better
  • Because it’s cool and I’ve paid for it :smiley:
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35

so there isn’t a way to look at the files without root? How about an image/backup?

36

Yes, this file is there on /e/OS (0.23-r-…stable-FP4):

Screenshot_20220520-001550_Total_Commander
Screenshot_20220520-001550_Total_Commander981×599 42 KB

1 Like
37

Not really VoWiFi uses Wi-Fi 2.4GHz or 5GHz bands via the internet
VoLTE uses the network you buy into with your SIM card. In vague terms VoLTE means using the 4G protocols over a variety of frequencies via local masts.

LTE frequency bands, in the UK, range from 0.8Ghz up to 2.6Ghz

5G has two wide areas (not to be confused with 5Ghz Wi-Fi)

  • 0.4Ghz to 7GHz ( with a range of bands, some overlapping with 4G and
  • then there is the really high bands up to 100Ghz
38

Sure I was just wondering if there is any special urgency, that it should work is agreed😉

Just found this, maybe try again once everything was fixed by Vodafone

In the Vodafone Forum is a topic from 2019 stating the following. I remember vaguely for O2 I had ims APN in the past, and even if this is somehow obsolete, it might be worth it to check the APN

Aber da es bei mir trotzdem nicht angezeigt wird, hab ich weiter gesucht und bin auf die Info gestoßen, dass der IMS-Dienst “registriert” sein muss. Ich habe zwar den APN “ims” in den Einstellungen stehen,

or did you try to reset all Network entries to force the phone to re-register (Einstellungen-System-Optionen zum zurücksetzen) I would make Screenshots of the current APN before

39

I know, but:

IMS is parent technology for both VoLTE & VoWifi. VoWifi is just extension to existing VoLTE Service served by IMS Platform. IMS provides many functions related to SIP-based calling.

and as both are not working, it seems to be an IMS issue.

40

no, didn’t - I’ve checked my APN data. But probably I’ll try that one. I’m wondering if “normal” Android on FP4 is suffering from the same issue, too. Because there’s another FP4 /e/ complaining about the same issue I think it isn’t an APN problem and I’d like confirmation about that before

41

I’ve tried it out on FPOS and for me at least WoWIFI was working but didn’t work any longer after installing /e/OS on the same device with same eSIM.
Although VoLTE showed “available” on network test page there was no setting in network → advanced like “4G-Anrufe” or similar and there was no symbol for VoLTE when disabling wifi. So I’m not sure this worked on FPOS neither.
I’ve updated the gitlab bug report for /e/OS.

2 Likes
42

It seems to be clear, that this is a /e/ issue, neither a provider nor a lineage issue - so I filed a bugreport as mentioned above. Thank you for your help!
Probably u are suffering from this issue, too, and like to send an Email to /e/-support as well.
At the Gitlab page we wrote an email to help you to point developers into the right direction. Feel free to use it as a template.

3 Likes
43

Support has already answered and bug label was attached. :slight_smile:

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44

So I sent in my adb log - I can’t revert to stock OS though. Can someone send in a stock adb log?

45

Some lines from the log file:

ImsPhoneCallTracker: [1] cacheCarrierConfiguration: No carrier config service found or not active subId = -1
Phone : isImsRegistered =false

Not sure what it exactly means - but Volker mentioned, the files should be all in place.
Hopefully it’s just a permission thing or so.

46

I’ve sent in the files as requested (for FPOS and /e/OS).