Box v1 firmware version should be v1.62 or higher
Box v2 firmware version should be v2.29 or higher
You must have z3x jtag activated card
in English
https://emmc-fm.com/
in Russian
https://gsmforum.ru/threads/z3x-easyjtag-emmc-file-manager-obsuzhdenie-raboty.265848/
Delivery time: 1-60 MINUTES
Service type: Server
Submit to verify allowed: No
Cancellation allowed: No
Order processing: Manual