: Use a USB 2.0 port instead of a blue USB 3.0 port, change the cable, and restart the process from Step 3. Red Light/No Signal After Flash
Complete Guide to Unlocking and Repairing the Zong E5573cs-322 (Firmware 21.323.01.00.306)
Right-click the file, select , and choose Extract to "ZONG E5573CS-322..." .
The Huawei E5573cs-322, branded by Zong 4G, is a highly popular portable Wi-Fi router. However, its default factory firmware limits its utility by locking the device to a single network and restricting advanced network management features. ZONG E5573CS-322 21.323.01.00.306 DIRECT FLASH.7z
Because firmware 21.323.01.00.306 restricts open USB ports, you must manually force the device into download mode:
When flashing a firmware update, it is essential to exercise caution and follow the recommended procedures:
: Manually configure the APN for your new network (e.g., Telenor or Jazz) via the Zong Device Portal 4G Activation : Use a USB 2
A computer running Windows 7, 10, or 11 (Windows Defender/Antivirus should be temporarily disabled to prevent tool interference). Software & Files
The router will restart and the PC will detect a different interface – often listed as . This confirms the device is now in a low‑level flashable state. One tutorial summarised the method:
The term indicates that this file is prepared to bypass standard verification checks. It pushes the system image directly to the device's NAND storage via a specialized data connection. Key Technical Benefits of Version 21.323.01.00.306 However, its default factory firmware limits its utility
Modifying the firmware of a portable hotspot involves several technical risks and considerations:
A .7z file is a compressed archive file that contains one or more files or folders. It is similar to a ZIP or RAR file but uses a different compression algorithm. The .7z file format is commonly used to distribute software packages, including firmware updates, because it allows for efficient compression and extraction of files.
By following this guide step by step – preparing the correct tools, putting the device into download mode, flashing the USB loader, writing the main firmware, and finally applying the unlock – you can successfully complete the process with minimal risk.
: Once flashed, the device is no longer restricted to the Zong network.