I have HTC One (model PN07100 - 801n) which I've unlocked and rooted. However I'm having an issue with booting Cyanogenmod, and the boot screen seems to loop endlessly. At my last attempt I left for half an hour. I'm using TWRP to install the ROMs, and doing a cache/dalvik cache clean before attempting a reboot.
The Cyanogenmod website lists many roms (not sure which ones apply to my model) and I've tried two;
m7tmo & m7ul.
NB: I'm on T-mobile but T-mobile in the UK.