HM-MIFIB Flashing Guide: Linux, LCD Drivers & Battery Setup

Flashing the HM-MIFIB is very similar to standard OpenStick dongles, with the added benefit that lk2nd and Linux can initialize the onboard color LCD display and battery fuel gauge!

Prerequisites

An authentic HM-MIFIB (MSM8916 with eMMC) router.
A fully charged battery (at least 3.8V; never flash on an empty battery!).
Host computer with fastboot, adb, and python3-serial.
Safety backups of your calibration data (fsg, modemst1, modemst2) — see Safety & Backups.
Download the HM-MIFIB OpenStick firmware package (lk2nd.img and debian-rootfs.img).

Step 1: Boot into Fastboot Mode

Power on the HM-MIFIB by holding the Power button for 3 seconds until the boot logo appears on the LCD.
Connect the router to your computer with a Micro-USB or USB-C data cable.
Check ADB detection:
Terminal window
```
adb devices
```
Reboot into Fastboot:
Terminal window
```
adb reboot bootloader
```

Alternative: If the device is powered off, hold the WPS button while inserting the USB cable to enter fastboot directly on supported bootloader revisions.

Confirm fastboot sees the device:

fastboot devices

Step 2: Flash the lk2nd Secondary Bootloader

lk2nd includes built-in panel drivers for the HM-MIFIB’s ST7735S display:

# Flash lk2nd into the boot partition
fastboot flash boot lk2nd.img

# Reboot into lk2nd
fastboot reboot

The LCD Screen Comes Alive!

Unlike headless dongles, the HM-MIFIB will display the lk2nd graphical fastboot screen directly on the 1.44” color LCD, rendering:

Fastboot mode indicator
Battery voltage and charge percentage
Current device tree target (msm8916-hm-mifib)

Step 3: Flash the Debian Root Filesystem

Once in the lk2nd fastboot interface:

# Flash the root filesystem into the system partition
fastboot flash rootfs debian-rootfs.img

# Erase old Android userdata
fastboot erase userdata

# Reboot into Debian!
fastboot reboot

Step 4: First Boot & SSH Access over USB

Allow roughly 45 seconds for the first boot.
The router will start up and configure a USB Ethernet adapter on your PC.
The router’s default IP is 192.168.68.1.

ssh user@192.168.68.1

Username: user
Password: 1
Root access: sudo su (password 1)

Step 5: Enabling the LCD Screen & Framebuffer in Linux

If your image does not have the console on the display enabled by default, verify the framebuffer:

# Check if fb0 exists
ls -l /dev/fb0

# Enable text console on the LCD
sudo sh -c 'echo 1 > /sys/class/graphics/fbcon/cursor_blink'

You can run a lightweight Python script or daemon that reads /sys/class/power_supply/battery/ and displays live system health on the screen:

# Quick battery monitor test
with open('/sys/class/power_supply/battery/capacity', 'r') as f:
    capacity = f.read().strip()
with open('/sys/class/power_supply/battery/voltage_now', 'r') as f:
    voltage = int(f.read().strip()) / 1000000

print(f"Battery: {capacity}% ({voltage:.2f}V)")

Step 6: 4G LTE Modem Initialization

# Enable modem
mmcli -m 0 --enable

# Add your cellular connection profile
sudo nmcli connection add type gsm ifname cdc-wdm0 con-name "Cellular4G" apn "internet"
sudo nmcli connection up "Cellular4G"

Frequently Asked Questions — HM-MIFIB (MIFIB)

Does OpenStick Debian support the HM-MIFIB LCD screen and battery?

Yes. With lk2nd and the HM-MIFIB mainline device tree, Linux initializes both the 1.44-inch SPI color LCD display and the PM8916 battery fuel gauge.

👉 Ready to flash? Download the 1-Click OpenStick Debian Installer or browse Verified Store Links.