: You can find region-specific user guides and firmware updates on the ZTE Support portal .

This means you downloaded firmware for a different hardware revision. For example, trying to install Rev D firmware on a Rev B board. Go back to Part 1 and verify your hardware revision.

: Detailed hardware specifications and installation steps for custom firmware are maintained on the OpenWrt Wiki for MF286R . MF286R(Poste) - ZTE - Support

cat /proc/version

If you have a update.bin or firmware.bin file from ZTE or your carrier:

Elias realized then that he hadn't updated the router's software. He had invited something in. He reached for the power cable, but his hand froze. The signal was too strong now. It wasn't just in the wires; it was in the air, vibrating in his very marrow. ZTE MF286R Go to product viewer dialog for this item.

Flash the initramfs image first, followed by the sysupgrade image .