i have been sent a few samples of this chip (so called "v1.88 upgradable"). it's claimed to be firmware upgradable. ok, i installed this chip in a v13 and lately in a v14. the chip worked fine just as modbo chips would do.
i copied the upgrade firmware (an elf file sent by my supplier) into a memory card and excuted it via dev1 mode. wow! the upgrade process went successful ! i then went to the config. manual and found the firmware is v1.93now which was v1.88 before the upgrade.
MI clone yes it is. they said it supports v1-v15 but i doubt it would work properly with v1-v3.