LTE Modem Doesn't Work

[Notsheesh]

Okay, so, it works now
I found out that I just need to restart the router lol

so here's the complete step by step solution with LuCI

• Install this packages kmod-usb-net-cdc-ether usb-modeswitch
• Reboot your router
• Then run dmesg | grep cdc
  it should now output the interface like this

root@OpenWrt:~# dmesg | grep cdc
[   15.408332] cdc_ether 1-1:1.0 eth1: register 'cdc_ether' at usb-101c0000.ehci-1, CDC Ethernet Device, 00:a0:c6:00:00:00

• Go to LuCI then on Network > Interfaces > Devices enable whatever interface that dmesg display
• Then go to Interfaces tab, click Add new interface...
• Put whatever name you want, select DHCP client, and select the interface that dmesg display
• Click create
• Don't forget to configure the firewall
• And that is it, it should work

and if it still doesn't work, then do this additional steps

• Install this additional package picocom usbutils kmod-usb-serial-option
• Run lsusb
  it should output your modem id

root@OpenWrt:~# lsusb
Bus 002 Device 001: ID 1d6b:0001 Linux 5.10.176 ohci_hcd Generic Platform OHCI controller
Bus 001 Device 002: ID 2cb7:0001 Fibocom,Incorporated Fibocom Mobile Boardband
Bus 001 Device 001: ID 1d6b:0002 Linux 5.10.176 ehci_hcd EHCI Host Controller

• Then run this, replace 2cb7 0001 with your modem ID, echo "2cb7 0001" > /sys/bus/usb-serial/drivers/option1/new_id
• Then run ls /dev | grep ttyUSB
  it should output like this

root@OpenWrt:~# ls /dev | grep ttyUSB
ttyUSB0
ttyUSB1
ttyUSB2
ttyUSB3
ttyUSB4
ttyUSB5

• Find the correct serial by running picocom /dev/ttyUSB{num} to each serial port, then run the command ATI
• After you found it, then set up the APN by running this command AT+CGDCONT=1,"IP","{your apn}","", change the {your apn} with your operator APN
• Then run this AT+GTRNDIS=1,1
• And it should work

or just follow this guide

Use cdc_ether driver based dongles for WAN connection