: Under normal conditions, once usbloader.bin successfully runs, the single "DownLoad Port" will disappear, and the device will instantly reconnect, showing two or three new ports (including a PCUI Port and a Modem Port ). If the ports disappear and never come back, the loader has crashed inside the modem RAM.
Open your firmware update tool (e.g., Huawei Flasher or a standard firmware EXE). Follow the prompts to install the new firmware and Web UI. Troubleshooting Tips
In all these cases, the usbloader.bin acts as a low-level loader that communicates with the device’s CPU before the main firmware loads.
| Feature | Specification | |---------|---------------| | Network | 4G LTE Cat4 (up to 150 Mbps down / 50 Mbps up) | | Bands | FDD-LTE: B1/B2/B3/B4/B5/B7/B8/B20/B28; TDD-LTE: B38/B40/B41; WCDMA: B1/B2/B5/B8 | | Wi-Fi | 802.11 b/g/n, up to 10 users | | Battery | 1500 mAh (removable) | | Micro-USB | For charging and data (modem mode) | | Max Devices | 10 simultaneous connections | e5573s320 usbloaderbin work
Once the loader is successfully sent, the device enters a state where it can accept new firmware.
This comprehensive guide breaks down how the usbloader.bin file works, how to use it to modify your Huawei E5573s-320 Go to product viewer dialog for this item. , and how to fix common errors during the flashing process. What is usbloader.bin and How Does It Work? Huawei E5573s-320 Go to product viewer dialog for this item.
: The file configures the hardware on the fly, opening up essential diagnostic and application COM ports (such as Huawei Mobile Connect - 3G PC UI Interface ). This allows full read/write access to the firmware partitions. Required Prerequisites and Software Tools Before attempting to make usbloader.bin work with your E5573s-320 Go to product viewer dialog for this item. , gather the following technical components: : Under normal conditions, once usbloader
: A common fix for "Error 19" (failed firmware flashing) which occurs when the device has a newer, locked firmware that prevents downgrading.
: Ensure the version matches the E5573s-320 (often included in firmware packages like 21.110.9 ). Modem Firmware and WebUI : To be installed after the loader. 2. The "Boot Shot" (Download Mode)
: This indicates that the specific usbloader.bin file you are using is incompatible with the security revision of your chip. Huawei patched security vulnerabilities across different manufacturing batches of the E5573s-320. Follow the prompts to install the new firmware and Web UI
If the modem is not detected as BOOT_3G , reinstall Huawei Mobile Partner or Drivers, or try another USB port.
If you’re not comfortable with command lines or hardware probing, consider using a paid unlocking service. But for the adventurous tech enthusiast, getting the usbloader.bin to work on the Huawei E5573s-320 is a gratifying achievement.
Performing this repair requires hardware access and specific software tools, such as those discussed on Hovatek and RouterUnlock . : Disassemble the modem to expose the motherboard. Locate the boot pin (test point).
E5573s-320 USBloader.bin Work: A Complete Guide to Unlocking and Repairing Your Huawei Modem