unfortunately I somehow bricked my ZTE Open. I flashed cwm (worked fine) but after flashing both system AND userdata via flash_image, the phone won't boot and what is much worse it won't boot into cwm anymore as it hangs there with just showing the logo and the cwm version. The menus are missing, it does not react buttons and does not show up in adb. FTM mode is also non-functional, holding volup gets you also into broken recovery.
For earlier ZTE devices like the ZTE Blade it seems to be possible to low level flash them in diagnostics mode. Diagnostics mode is working fine on the ZTE Open (it shows up with the diagnostics port on USB. Luckily I also have all the 20 partitions backed up, but I don't know how to flash them in this diagnostics mode. I tried putting the files into the root of the SD card and including sha1/256/512 plus md5sum files, but it was not impressed by that. Not sure if this only works in FTM mode, though.
Any help would be highly appreciated! I highly assume that the procedure is the same as for the ZTE Blade.