GR5 or Honor 5x shows that there is a software version control problems

machine7120

New member
Feb 21, 2018
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hello,
i used adb tool to downgrade from the slowly version 6.0.1 (KII-L21c185b321 ) to the old version 5.1 (KII-L21C432B140)

the device do not start but shows the bootloader screen ,
i tried to use another version but every time the update fails

the error message is :
software install failed
get help from : ***.emui.***/emotiondownload.php?mod=restore

reboot system now


what should i do ?