A critical aspect of the B760HS3 firmware is the fragmentation caused by ISP customization. ZTE provides a base "SDK" (Software Development Kit) to the ISP. The ISP then integrates their specific middleware (for Video on Demand, Electronic Program Guides, etc.).

Place the update.zip file directly into the root directory of the USB flash drive. Boot into Recovery Mode: Power off the set-top box completely. Insert the USB drive into one of the USB ports.

If your box is completely unresponsive (hard-bricked), you must flash an image file directly to the flash storage via a computer.

: Most ZTE Android boxes utilizing Amlogic or similar chipsets require burning tools like the Amlogic USB Burning Tool or specialized operator-unvetted flashing executables.