Release the tweezers after two seconds. Your PC will make a hardware connection sound, and Device Manager will show a single or "BALONG V7R11" port. Phase 3: Flashing the Unlock Firmware
Download the specific "E8372h-320" unlock firmware and the "Huawei Flash Tool" or "Balong USB Downloader." Step 1: Driver Installation and Device Detection
By following these steps, your Huawei E8372h-320 will be free from carrier restrictions, allowing you to use any SIM card worldwide and optimize your 4G speeds through band selection.
: Unlocks the device to accept SIM cards from any worldwide network provider.
To install modified firmware, the E8372h-320 must be placed into a special state called Emergency Download Mode (also known as Boot ROM mode or COM port mode). Software Method (If firmware allows) Plug the device into the PC. e8372h320 unlock firmware install
: Essential files include FcSerialDrv.rar , Huawei_Drivers.rar , and E8372_switch_mode.7z to switch the device into download mode.
If your tool doesn’t support backup, at least capture the (holds IMEI and unlock status). Use AT+CGSN=1 via terminal after enabling debug mode.
Windows requires specific drivers to communicate with the modem when it is in download mode. Without these drivers, the flashing software cannot detect the hardware.
: Ensure the model number under the cap matches exactly. Release the tweezers after two seconds
Load the custom firmware file (typically a .bin or .hmf file customized for the E8372h-320). Click or Flash to begin the process.
At its core, it uses , supporting theoretical download speeds of up to 150 Mbps and uploads of up to 50 Mbps . This makes it more than capable for bandwidth-intensive tasks like 4K video streaming, video conferencing, or online gaming. It supports a wide array of 4G (LTE-FDD: Bands 1/3/5/7/8/20/28) and 3G frequencies, ensuring broad global compatibility. Additional features include a built-in microSD card slot (for network-attached storage) and two external TS-9 antenna ports to boost reception in low-signal areas.
Open your web browser and load the device's gateway page at http://192.168.8.1 to confirm that the hardware is active.
Carriers subsidize the hardware cost. In exchange, they flash a proprietary firmware that restricts the SIM slot to their network’s ICCIDs (SIM card IDs). Unlocking via code is possible, but often expensive or impossible for older modems. by rewriting the modem’s bootloader and operating system. : Unlocks the device to accept SIM cards
Using Huawei Firmware Extractor , you can back up the nvram and oeminfo partitions. This allows recovery if something goes wrong.
Modifying the firmware of a hardware device requires precise software components to prevent bricking the modem. Ensure the following assets are ready:
balong_flash.exe --write --partition=rootfs --file=openwrt-rootfs.bin balong_flash.exe --write --partition=kernel --file=openwrt-kernel.bin balong_flash.exe --write --partition=uboot --file=openwrt-uboot.bin
Interrupting the installation process can permanently disable your device.