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diff --git a/UPDATING b/UPDATING
--- a/UPDATING
+++ b/UPDATING
@@ -27,6 +27,10 @@
world, or to merely disable the most expensive debugging functionality
at runtime, run "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
+20230204:
+ Since commit 75d41cb6967 Huawei E3372 3G/4G LTE Mobile Devices do not default
+ to ECM, but NCM mode and need the u3g and ucom modules loaded. See cdce(4).
+
20230130:
As of commit 7c40e2d5f685, the dependency on netlink(4) has been added
to the linux_common(4) module. Users relying on linux_common may need
diff --git a/share/man/man4/cdce.4 b/share/man/man4/cdce.4
--- a/share/man/man4/cdce.4
+++ b/share/man/man4/cdce.4
@@ -28,7 +28,7 @@
.\" $NetBSD: cdce.4,v 1.4 2004/12/08 18:35:56 peter Exp $
.\" $FreeBSD$
.\"
-.Dd July 10, 2019
+.Dd January 6, 2023
.Dt CDCE 4
.Os
.Sh NAME
@@ -47,6 +47,13 @@
.Cd "device cdce"
.Ed
.Pp
+Mobile Devices (eg. Huawei E3372, E5573 and others)
+may need additionally the u3g command port:
+.Bd -ragged -offset indent
+.Cd "device ucom"
+.Cd "device u3g"
+.Ed
+.Pp
Alternatively, to load the driver as a
module at boot time, place the following line in
.Xr loader.conf 5 :
@@ -77,6 +84,13 @@
The
.Nm
driver does not support different media types or options.
+.Pp
+Mobile
+.Nm
+Network Devices may need a connect command sequence via u3g
+serial command port before they activate the NCM/ECM/ACM network
+interface. Example: echo 'AT^NDISUP=1,1,"internet"' > /dev/cuaU[0].0,
+where "internet" is your providers apn name.
.Sh HARDWARE
The following devices are supported by the
.Nm
@@ -93,6 +107,8 @@
Realtek RTL8156 USB GBE/2.5G Ethernet Family Controller
.It
Planex USB-LAN2500R
+.It
+Huawei 3G/4G LTE (eg. E3372, E5573) and other mobile network devices
.El
.Sh DIAGNOSTICS
.Bl -diag
@@ -127,6 +143,8 @@
.Xr netintro 4 ,
.Xr urndis 4 ,
.Xr usb 4 ,
+.Xr ucom 4 ,
+.Xr u3g 4 ,
.Xr ifconfig 8
.Rs
.%T "Universal Serial Bus Class Definitions for Communication Devices"
diff --git a/sys/dev/usb/serial/u3g.c b/sys/dev/usb/serial/u3g.c
--- a/sys/dev/usb/serial/u3g.c
+++ b/sys/dev/usb/serial/u3g.c
@@ -343,6 +343,7 @@
U3G_DEV(HUAWEI, E3272_INIT, U3GINIT_HUAWEISCSI2),
U3G_DEV(HUAWEI, E3272, 0),
U3G_DEV(HUAWEI, E3372_INIT, U3GINIT_HUAWEISCSI3),
+U3G_DEV(HUAWEI, E3372_NCM, 0),
U3G_DEV(HUAWEI, E3372v153_INIT, U3GINIT_HUAWEISCSI2),
U3G_DEV(HUAWEI, E3372v153_NCM, 0),
U3G_DEV(HUAWEI, E5573Cs322_NCM, 0),

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