Once the bootloader is active, run the official or modified firmware installer ( .exe file).
If successful, your PC should recognize it as "Huawei Mobile Connect - DownLoad Port" (COM Port) instead of a standard modem. You can then release the short. Step 3: Load the Bootloader Open the Balong USB Downloader tool. Select the correct COM port identified in Device Manager. Load the usbloader.bin file and click Load/Start .
Open the casing of the Huawei E8372h-153 carefully. Locate the PCB (Printed Circuit Board). Step 2: Locate the Testpoint
Snap the motherboard back into its plastic casing and tighten the screws. Plug the modem back into the PC. E8372h-153 Dead Boot Repair
Carefully pry open the shell to expose the green printed circuit board (PCB).
Open or your preferred Huawei firmware installer.
Small screwdriver, a pair of tweezers or a metal pin (for the test point), and a PC with a stable USB port. Huawei USB COM Drivers: Once the bootloader is active, run the official
: Specifically the Huawei_Driver_5.05.01.00 or newer, and the Huawei Mobile Connect-Setup .
Check Device Manager again. The port should change from the download port to two or three distinct Huawei application/modem ports (typically including a PC UI Interface port). Step 5: Flash Stock Firmware and WebUI
With the bootloader active, the device is now ready to accept full firmware: Use a flashing tool like balongflash or the official Huawei update executable. Wait for the process to reach 100%. Do not unplug the device during this stage. 5. Post-Repair Reset Step 3: Load the Bootloader Open the Balong
The standard Wi-Fi and Power LED lights should now light up normally.
Device Manager Shows "Unknown USB Device (Device Descriptor Request Failed)"
Run the firmware installer executable (usually named Update_21.XXX.XX.XX_Universal.exe ).
: A stock or unlocked firmware version compatible with the E8372h-153 (e.g., version 21.327.xx.xx.xx ). Step 1: Disassemble the Modem