from the community discussion on 18th august:
07:21:13 <flypig> #topic Is there a general cause to the various different mobile-data bugs with 10 III devices? (10m -- asked by PeegeeTips)
07:21:22 <flypig> #info <PeegeeTips> There are several bugs on the forum that look like they might be related.
07:21:29 <flypig> #info <PeegeeTips> 1. Xperia 10 iii can't enable mobile data on Talkmobile (UK):
07:21:34 <flypig> #link https://forum.sailfishos.org/t/xperia-10-iii-cant-enable-mobile-data-on-talkmobile-use-the-same-settings-used-on-my-xa2-plus/12485
07:21:38 <flypig> #info <PeegeeTips> 2. No IPv4 mobile data connection with MNO Telekom Deutschland possible:
07:21:44 <flypig> #link https://forum.sailfishos.org/t/ipv4-mobile-data-connection-not-possible/11917
07:21:48 <flypig> #info <PeegeeTips> 3. Mobile data (IPv6) connection used even though a WLAN connection (IPv4) is active:
07:21:53 <flypig> #link https://forum.sailfishos.org/t/use-of-mobile-data-ipv6-although-a-wlan-connection-ipv4-is-active/11918
07:22:02 <flypig> Here is our prepared answer:
07:22:08 <flypig> #info <Jolla> There have been a number of changes to the networking stack recently that could be related to the first two. Some users were experiencing mobile data connections when the data access point protocol was set to Dual:
07:22:14 <flypig> #link https://forum.sailfishos.org/t/4-2-0-19-xperia-10ii-no-internet-connection-on-mobile-data-when-leaving-wifi-if-data-access-point-protocol-is-set-to-dual-default/6697
07:22:19 <flypig> #info <Jolla> This was carrier specific, with a fix being rolled out in Sailfish OS 4.4.0.64:
07:22:30 <flypig> #link https://github.com/sailfishos/connman/pull/8
07:22:35 <flypig> #info <Jolla> For issue 3, a fix was introduced to work around the fact that VoLTE can create new IPv6 interfaces with potentially broken routing data (this is carrier dependent). This fix was rolled out in Sailfish OS 4.4.0.68:
07:22:44 <flypig> #link https://github.com/sailfishos/connman/pull/29
07:22:50 <flypig> #info <Jolla> Unfortunately it’s impossible to say whether the three are related without further investigation. We already had an internal issue lodged for issue 3 which has been looked into, and we also now have internal issues for the other two as well.
07:23:01 <flypig> #info <Jolla> The discussion in the forum is already quite comprehensive and very helpful, but as always any further detail you can add there is also appreciated.
07:23:22 <flypig> Is PeegeeTips here today? Any other comments welcome.
07:24:37 <ExTechOp> I believe this is kinda related to the long-standing issue of SFOS being quite bad at switching networks (mobile/wifi/mobile), specially for Android clients
07:26:56 <flypig> Yeah. Over the years we've squashed many bugs related to this (both for Android App Support and SFOS generally), but issues do arise.
07:28:37 <sledges> suggestion to use Ofono Logger when mobile data cannot be enabled at all (regardless of wlan state etc) and send logs (app has disclaimer that some information may be private, such as phone numbers, but emailing it straight to monich has been revoked due to in-app sharing broken)
07:30:41 <flypig> sledges, just to clarify, what should users do with the logs then?
07:31:32 <flypig> And would you add a comment on this to the minutes please sledges?
07:32:16 <flypig> 2 more mins on this topic.
07:33:25 <sledges> ensure there are no phone numbers in the logs (simply do not make/receive phonecalls during log grab); I believe sending them to jolla customer care is now the best bet, where data protection is ensured
07:33:42 <flypig> Great, thank you sledges.
07:34:24 <sledges> #info for mobile data issues please grab logs via Ofono Logger:
07:34:26 <sledges> #link https://openrepos.net/content/slava/ofono-logger
07:34:58 <flypig> Perfect, thank you.
07:34:58 <sledges> #info ensure no phonecalls made/received during the session, then provide the tarball to jolla customer care
07:35:24 <sledges> sadly logger is no longer in Jolla Store, i bet it's sandboxing/in-app sharing issues etc
07:36:11 <Thaodan> #info Ofono Logger is also available in chum.
07:36:15 <Thaodan> #link https://build.merproject.org/package/show/sailfishos:chum/openrepos-logger-ofono
07:37:15 <flypig> Okay, thanks for the helpful info. It's a shame PeegeeTips isn't here to comment, but hopefully this will be helpful to them.