I purchased this by device from someone online it is a Taiwanese version HTC 10 running 1.8 0.709 point one I do not know if I'm running the most latest software and I get an error when I try and update OTA the device is s-off but locked
Try to use the system restore and format your SD card, make sure your phone is not rooted.
It should be good.
PS: I'm currently use the taiwanese version, and living in europe, I have no problem about OTA. So doesn't matter where you live, you should update your system without problem.