Restrict modem (EC21) one of 3G or 4G - ModemManager 1.10.0 (Debian Buster)

[Brendan Simon (eTRIX)]

*RESEND**
*
On 21/10/2020 3:59 pm, Brendan Simon (eTRIX) wrote:
> On 19/08/2020 2:13 am, Aleksander Morgado wrote:
>>> 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:https://gitlab.freedesktop.org/mobile-broadband/ModemManager/-/commit/c70b3557184fdf1472ff0cb36e9fd937cc7f9024
> 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**
>
> *Is this a bug?  Maybe there is something else going on**?**
> **Any ideas or suggestions to get an LTE connection with setting 4G as 
> the only allowed mode?*

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/modemmanager-devel/attachments/20201026/b3424f86/attachment.htm>