thats the thing, i can get in to fastboot, try to run the 2.20 RUU starts and maybe 1 minute later it fails, and gives a ERROR  i google it and it seems to be because the cid its not the correct one anyone knows if there its a way to bypass the cid verification?
Try this thread. I think there is a way to use the stock recovery and the cid you used to unlock it. May give you some ideas.
AT&T HTC OneX