After flashing board software not need converter tool,repair region and model in HCU ,but downgrade and change region not supported by DC Converter Tool on the last firmware and flashing make dead phone.
Any roms crypted from support not unpacking cust-userdata for region themes-keyboards and etc and only after reflashing customization file is main.APP by fastboot created customisation in phone.
Please check this may be error crypt service rom for flashing tools. |