I've been given a One X (he bought an M8) and I thought I'd easily put on KK 4.4.4, but I have hit a brick wall.
It was running ViperX 2.6.0 with Hboot 0.95, and it's S-ON.
Well 4.4.4 needs a Hboot above 1.28, so the flashing failed.
So I did my homework and got the CID (it's HTC-023) to install the firmware so that I could update the Hboot via OTA.
So I installed the boot.img for the HTC-023 firmware and that (of course) was a an error as I didn't have a copy of the boot.img for the ViperX 2.6.0.
Then the firmware was a .rar file and didn't install anyrate.
So now it's in bootloop.
I have not been able to find a copy of ViperX 2.6.0 to extract the required boot.img
I've got TWRP with Sideloader installed, and ADB works fine.
So I am stuck (like my One X really) so any advice would be appreciated.