Most unlocked firmwares enable the hidden menu. Go to: http://192.168.8.1/html/band.html or http://192.168.1.1/engineering.html
Official firmware updates, such as version 10.0.1.1 , often improve SMS functionality, firewall settings, and IPv4/IPv6 support but do not automatically unlock the device. Platform: The is built on the Balong V700R11 chipset. B311-221 Unlock Firmware
: Once your request is approved, you'll be provided with an unlock code and instructions on how to use it. Most unlocked firmwares enable the hidden menu