Originally Posted by BenPope
Just stop doing stuff.
Have a cup of tea.
Now, go to your boot loader, are you locked, relocked unlocked?
Make sure you're unlocked, you may need a new token from HTC.
After getting unlocked, get the latest TWRP for your phone and flash it in fastboot mode:
fastboot flash recovery openrecovery.zip
Now, find a ROM you want, I recommend ARHD. In recovery mount the SD card and copy the ROM to the phone. If that doesn't work, try adb sideload or adb push.
Then flash it.
If any steps fail, post here with what you did and the error message.
I found this one more helpful than the next post you posted but ive gotten to the TWRP.
Right now my bootloader looks like this.
*** TAMPARED ***
*** UNLOCKED ***
M7_UL PVT SHIP S-ON RH
Jan 28 2014, 09:32:41.0
<VOL UP> to previous item
<VOL DOWN> to next item
<POWER> to select item
When i flashed TWRP the message i got was the following.
target reported max download size of 1514139648 bytes
sending 'recovery' (9948 KB)...
OKAY [ 1.202s]
OKAY [ 0.753s]
finished. total time: 1.956s
If thats good then great its as far as i've gotten so far.
Ok, for the rom HTC One does not have an SD card slot, so thats out the window.
How else can i put in ARHD ROM or any other very simple ROM (if you could reccomend any) on the phone.
You said in your response to try adb sideload or adb push.
Im skeptical on whether i should wait for you to answer or just look up videos of how to do it.