Zong E5573cs-322 21.323.01.00.306 Direct Flash.7z «CONFIRMED»
: Many methods for this device require "boot-pinning" or opening the case. This specific file is often paired with methods that allow for a "without dismantle" unlock process.
If you inserted a non-ZONG SIM card and the device says “Invalid SIM,” you need to unlock the device. The .306 firmware is vulnerable to the “Huawei Fastboot” unlock exploit. Newer firmwares (.500+) patch this exploit.
This specific version, 21.323.01.00.306, is often sought after because: