[Bug 263783] USB MBIM: Support for LTE/4G USB modems (MBIM)

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From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 11 Oct 2025 07:48:26 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263783

--- Comment #106 from Andre Albsmeier <mail@fbsd2.e4m.org> ---
Another success story: The Fibocom "L830 LTE Module" works as well
(14.3-STABLE). However, after umbctl and "ifconfig up" the radio has to be
toggled off and on using at+cfun=4 and at+cfun=1.
I spent hours checking why I didn't get an IP after "ifconfig up" and suspected
another drive/modem issue just to find out that at+cfun is needed. Probably the
cleanest way is to do

at+cfun=4
umbctl umb0 apn bla.bla
ifconfig umb0 up
at+cfun=1

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