I'm trying to just boot the TWRP image for my OnePlus 5t to then install a custom ROM. So I typed
fastboot boot "C:\Users\Elias\Downloads\twrp-3.3.1-0-dumpling.img" and it seemed to work and I got the output:
Downloading 'boot.img' OKAY [ 0.808s] booting OKAY [ 10.119s] Finished. Total time: 10.992s
But the device just shows the text: "Fastboot Mode" and doesn't do anything.
I now read on this forum that they somehow removed it but it would still be possible with:
fastboot -c "lge.kcal=0|0|0|x" boot customrecovery.img
but this flag doesn't seem to exist.
The output is:
C:\platform-tools\fastboot.exe: unknown option -- c
My goal is just to install a custom ROM without actually flashing anything except the ROM. So if somebody knows a different way, it would be welcome as well.