Officially, no. Once the ISP marks a version as "current," reverting via the GUI is impossible. You must use TFTP with an older firmware file.
: The web UI (User Interface) often features an "Expert" view that unlocks advanced settings for port forwarding, firewall rules, and LAN IP management. Hardware Specifications (Firmware Context) CPU : Broadcom BCM63168 (dual-core, 400 MHz). easybox 804 firmware