Originally Posted by nkk71
Are you in bootloader/FASTBOOT USB (screenshot attached)? ./fastboot devices only works in bootloader
./adb devices only works in custom recovery or booted up phone (with USB debugging enabled)
I was in "fastboot" after I did "hold down volume and power button"
I've been trying to figure out how to make sure i have "USB debugging enabled" when this HTC One doesn't give me the option flat out in settings like my previous Androids did (HTC Rezound, Galaxy S3, Thunderbolt, etc.)