<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> On 19/08/2020 2:13 am, Aleksander Morgado wrote: <blockquote type="cite" cite="mid:CAAP7uc+w9uL1hZKLXQ9Jn8C0BpRC0GeQzp2W6FnUakdcwmqMyw@mail.gmail.com"> <blockquote type="cite"> <pre class="moz-quote-pre" wrap="">This may be a known issue with QMI modems where the internal network registration attempt is done with "QMI NAS Register In Network"; this command not only registers in network, it also makes the access tech preference fallback to "any", and MM doesn't consider that in its API. There is a recent patch to avoid this, by avoiding the use of "NAS Register in Network" and use "NAS Set System Selection Preference" instead: <a class="moz-txt-link-freetext" href="https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/commit/c70b3557184fdf1472ff0cb36e9fd937cc7f9024">https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/commit/c70b3557184fdf1472ff0cb36e9fd937cc7f9024</a> That patch is not yet in any release, though, not even in 1.14.0. I'll backport it to the 1.14.x branch so that it gets into 1.14.2. So the 64 million dollar question is when is 1.14.2 likely to be released ? </pre> </blockquote> <pre class="moz-quote-pre" wrap=""> Sometime in the next few weeks I'd say.</pre> </blockquote> So it's been a while, but I now have MM 1.14.2 installed on my embedded system via Debian Buster Backports repo. I can successfully set the allowed mode to "3G" and get a UMTS connection. mmcli -m 0 --set-allowed-modes="3G" However, if I try to lock to 4G the connection never succeeds. mmcli -m 0 --set-allowed-modes="4G" The only way I can get an LTE connection is with the following. mmcli -m 0 --set-allowed-modes="3G|4G" --set-preferred-mode=4G I presume this is a bug? But maybe there is something else going on? Any ideas or suggestions to get an LTE connection with setting 4G as the only allowed mode? Also, I've just noticed that 1.14.6 has just hit the Buster Backport repo. I'm not sure if that will help or not, but I don't see anything in the NEWS file that would suggest a change in this area. <a class="moz-txt-link-freetext" href="https://github.com/freedesktop/ModemManager/blob/mm-1-14/NEWS">https://github.com/freedesktop/ModemManager/blob/mm-1-14/NEWS</a> Thanks, Brendan. </body> </html>