Hey guys, I want to revert my U Ultra to barebones stock Oreo ROM. Now the thing is, my installation doesn't seem to work, for whatever reason. I have attached a screenshot from the error message I get in the command prompt on Windows. I have USB Debugging enabled on my phone (running some version of Lineage OS with Android 10 at the moment), have the device drivers installed. I tried to lock my bootloader first with fastboot OEM lock but for whatever reason, it doesn't work either.


Ru_security_fail Zip From Usb Command In Download Mode


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