Originally Posted by justein
I have perused the forums of multiple HTC devices, trying to figure out if I can flash any RUU I want (that is compatible) to an HTC One M7 that is S-OFF. If I can, do I need to downgrade my HBOOT before applying these RUUs? Thanks to anyone who replies.
Assuming you have a M7 that is S-OFF and you want to run a M7 RUU of the same type of M7_U/UL then yes. You have to make sure that your CID & MID are compatible. If the hboot is lower than the phone then you will need to downgrade the hboot.
It would be easier if you would post what RUU and the fastboot getvar all
except for imei and serialno of your phone. If you want a more definitive answer.