Here’s a draft for a forum or blog post about preparing the driver for a on Linux (e.g., Ubuntu/Debian). You can adjust the title and tags as needed. Title: 4G-UFI-XX Driver Prep – Get Your USB Modem Working on Linux
sudo nano /etc/usb_modeswitch.d/05c6:9091 Content:
4G, UFI, USB modem, Linux, driver, RNDIS, QMI, ECM 4g-ufi-xx driver
ip link show You should see wwan0 or usb0 . Using ModemManager + NetworkManager:
lsusb -t sudo apt update sudo apt install usb-modeswitch usb-modeswitch-data modemmanager wvdial 3. Switch from storage to modem mode Many UFI sticks start as a CD-ROM. Use usb_modeswitch manually if needed. Find your idVendor:idProduct (e.g., 05c6:9091 ). Here’s a draft for a forum or blog
sudo modprobe qmi_wwan echo "05c6 9003" | sudo tee /sys/bus/usb/drivers/qmi_wwan/new_id Make it permanent with a udev rule:
Also check modes:
# 4G-UFI-XX DefaultVendor=0x05c6 DefaultProduct=0x9091 MessageContent="5553424312345678000000000000061b000000020000000000000000000000" Then run:
lsusb -t | grep -A 5 "Modem" Force load, for example: Using ModemManager + NetworkManager: lsusb -t sudo apt