OLD router xiaomi mi mini usb2+ USB2 MT7620A 1core mips 580MHz;
16MB/128MB DDR2; WiFi 2.4Ghz 2x2 (300M) + 5Ghz 2x2 (867M); WAN 100M + LAN ั
2 100M
OpenWrt 24.10.1 r28597-0425664679 / LuCI (HEAD detached at 2ac26e56) branch 25.103.51521~2ac26e5
opkg update
opkg install kmod-usb-net-huawei-cdc-ncm
opkg install kmod-usb-net-cdc-ether
opkg install usb-modeswitch
*restart, 2min waiting... Nowhere in the [Network] v [Interfaces] v [Add new interface] 
USB LTE E3372H -320 Hilink modem (the most **** version of them without custom firmwares, root, scripts, TTL fixes ...), newest firmware 10.0.3.1 (h192sp2c983), webui 10.0.3.1 (W13SP3C7702). OK on the PC with smartphone's SIM, 192.168.8.1 default webgui, green led - connected LTE, SMS ok, but in the router it did not even appear in the GUI Interfaces.
dmesg
[ 4.079122]
[ 4.079122] ehci-platform 101c0000.ehci: irq 26, io mem 0x101c0000
[ 4.095557] ehci-platform 101c0000.ehci: USB 2.0 started, EHCI 1.00
[ 4.103476] hub 1-0:1.0: USB hub found
[ 4.108525] hub 1-0:1.0: 1 port detected
[ 4.124846] ohci-platform 101c1000.ohci: Generic Platform OHCI controller
[ 4.131918] ohci-platform 101c1000.ohci: new USB bus registered, assigned bus number 2
[ 4.140317] ohci-platform 101c1000.ohci: irq 26, io mem 0x101c1000
[ 4.176844] hub 2-0:1.0: USB hub found
[ 4.181573] hub 2-0:1.0: 1 port detected
[ 4.198865] kmodloader: done loading kernel modules from /etc/modules-boot.d/*
[ 4.208270] init: - preinit -
[ 4.515374] usb 1-1: new high-speed USB device number 2 using ehci-platform
[ 7.250377] random: crng init done
[ 8.313618] 8021q: adding VLAN 0 to HW filter on device eth0
[ 10.096514] jffs2: notice: (459) jffs2_build_xattr_subsystem: complete building xattr subsystem, 35 of xdatum (3 unchecked, 26 orphan) and 39 of xref (13 dead, 15 orphan) found.
[ 10.114885] mount_root: switching to jffs2 overlay
[ 10.123341] overlayfs: upper fs does not support tmpfile.
[ 10.139074] urandom-seed: Seeding with /etc/urandom.seed
[ 10.268133] procd: - early -
[ 10.271457] procd: - watchdog -
[ 10.894353] procd: - watchdog -
[ 10.898826] procd: - ubus -
[ 11.058021] procd: - init -
[ 12.856887] kmodloader: loading kernel modules from /etc/modules.d/*
[ 13.576752] jitterentropy: Initialization failed with host not compliant with requirements: 9
[ 14.048041] Loading modules backported from Linux version v6.12.6-0-ge9d65b48ce1a
[ 14.055797] Backport generated by backports.git v6.1.110-1-35-g410656ef04d2
[ 14.686254] mt76x2e 0000:01:00.0: card - bus=0x1, slot = 0x0 irq=4
[ 14.692976] mt76x2e 0000:01:00.0: ASIC revision: 76120044
[ 15.401807] mt76x2e 0000:01:00.0: ROM patch build: 20141115060606a
[ 15.432566] mt76x2e 0000:01:00.0: Firmware Version: 0.0.00
[ 15.438211] mt76x2e 0000:01:00.0: Build: 1
[ 15.442461] mt76x2e 0000:01:00.0: Build Time: 201607111443____
[ 15.510572] mt76x2e 0000:01:00.0: Firmware running!
[ 15.515767] mt76x2e 0000:01:00.0: registering led 'mt76-phy0'
[ 15.523776] ieee80211 phy0: Selected rate control algorithm 'minstrel_ht'
[ 15.838134] PPP generic driver version 2.4.2
[ 15.881898] NET: Registered PF_PPPOX protocol family
[ 16.023159] ieee80211 phy1: rt2x00_set_rt: Info - RT chipset 6352, rev 0500 detected
[ 16.031564] ieee80211 phy1: rt2x00_set_rf: Info - RF chipset 7620 detected
[ 16.040421] ieee80211 phy1: Selected rate control algorithm 'minstrel_ht'
[ 16.502510] jitterentropy: Initialization failed with host not compliant with requirements: 9
[ 17.391050] kmodloader: 1 module could not be probed
[ 17.396472] kmodloader: - jitterentropy_rng - 0
[ 62.769378] 8021q: adding VLAN 0 to HW filter on device eth0
[ 62.871528] br-lan: port 1(eth0.1) entered blocking state
[ 62.877088] br-lan: port 1(eth0.1) entered disabled state
[ 62.882732] eth0.1: entered allmulticast mode
[ 62.887200] mtk_soc_eth 10100000.ethernet eth0: entered allmulticast mode
[ 62.894558] eth0.1: entered promiscuous mode
[ 62.898954] mtk_soc_eth 10100000.ethernet eth0: entered promiscuous mode
[ 63.055644] br-lan: port 1(eth0.1) entered blocking state
[ 63.061274] br-lan: port 1(eth0.1) entered forwarding state
[ 74.482702] ieee80211 phy1: rt2800_rxiq_calibration: Warning - RXIQ calibration FAIL
[ 74.514450] br-lan: port 2(phy1-ap0) entered blocking state
[ 74.520335] br-lan: port 2(phy1-ap0) entered disabled state
[ 74.526165] rt2800_wmac 10180000.wmac phy1-ap0: entered allmulticast mode
[ 74.533575] rt2800_wmac 10180000.wmac phy1-ap0: entered promiscuous mode
[ 83.315231] ieee80211 phy1: rt2800_rxiq_calibration: Warning - RXIQ calibration FAIL
[ 83.351809] br-lan: port 2(phy1-ap0) entered blocking state
[ 83.357546] br-lan: port 2(phy1-ap0) entered forwarding state
[ 147.592279] urngd: v1.0.2 started.
[ 372.841600] usb 1-1: USB disconnect, device number 2
[ 376.004912] usb 1-1: new high-speed USB device number 3 using ehci-platform
[ 420.916573] usb 1-1: USB disconnect, device number 3
[ 421.967238] usb 1-1: new high-speed USB device number 4 using ehci-platform
root@OpenWrt:~#
[ 372.841600] usb 1-1: USB disconnect, device number 2
[ 376.004912] usb 1-1: new high-speed USB device number 3 using ehci-platform
[ 420.916573] usb 1-1: USB disconnect, device number 3
[ 421.967238] usb 1-1: new high-speed USB device number 4 using ehci-platform
[ 477.549452] usb 1-1: USB disconnect, device number 4
[ 501.098871] usb 1-1: new high-speed USB device number 5 using ehci-platform
[ 504.508730] usb 1-1: USB disconnect, device number 5
[ 505.108392] usb 1-1: new high-speed USB device number 6 using ehci-platform
lsusb
root@OpenWrt:~# lsusb
Bus 001 Device 001: ID 1d6b:0002 Linux 6.6.86 ehci_hcd EHCI Host Controller
Bus 001 Device 007: ID 12d1:14db HUAWEI_MOBILE HUAWEI_MOBILE
Bus 002 Device 001: ID 1d6b:0001 Linux 6.6.86 ohci_hcd Generic Platform OHCI controller
USB LTE E3372H-320 Hilink not working on OpenWRT 24.10.1
No any ttyUSB*