look dear brother
problem 100%software
but this wave phones downgrade not possible with any tools
you can use jtag erase full flash memory then flash 1.2 firmware
after flash phone is alive but imei not active(means imei null)
you can rebuild imei via z3x (z3x need to write patch file)patch file avilable on z3x support area
then unlock and reset phone
listen after flash cant updates camera firmware
cuz after cam firmware updates again to killed cam