| Problem | Possible Solution | |---------|-------------------| | | Install the BOS registry fix. Use usblsafe instead of usbloader to preserve NVRAM data. | | Flash fails with “Rejected block 60 section 0 error code 15” | This usually means the firmware is not compatible with the existing bootloader. Try a different firmware package (e.g., 21.323.01.00.306 from another source). | | Modem is not detected in download mode | Reinstall Huawei USB drivers. Try a different USB port or cable. Use the AT^GODLOAD command again. | | After flash, IMEI shows all zeros | You may have erased the NVRAM region. Avoid using usbloader ; use usblsafe instead. Some universal firmware includes an option to fix the IMEI via AT commands. | | Device enters a boot loop | You might have missed flashing the WebUI component. Flash both the base firmware and the WebUI update (e.g., Update_WEBUI_17.100.15.01.356_MRE5 ). |
Right-click on ZONG E5573CS-322 21.323.01.00.306 DIRECT FLASH.7z and extract it to a dedicated folder on your desktop. Inside, you should typically find: A usbloader.bin file. ZONG E5573CS-322 21.323.01.00.306 DIRECT FLASH.7z
Use a high-quality data-sync cable. Avoid cheap, charge-only micro-USB cables. Overview of the Direct Flashing Workflow Try a different firmware package (e