It came with 4.4.2 with Sense 5.5, I received the OTA notification and updated it.
After the reboot it came back as it was. So I restarted it again with the update wizard.
The phone entered a boot loop, so I long pressed Vol- to enter recovery and then started to press everything and wiped the whole phone...
Now I am stuck with a HTC logo which never gets past. Only when I long press Power button the the capacitive buttons are starts to blink then the phone restarts and if I long press Vol- it enters Recovery.
The phone has installed TWRP on it.
This is what is shown at the Recovery screen:
M7_UL PVT SHIP S-ON RH
Feb 26 2014.12:32:09.0
My CID is HTC__102 (HTC DE)