Help HTC ONE M8 no os installed.

[Krisztianh]

Hello.I tried to root my HTC One M8 and when I tapped one my phone shut off and won't fully turn on. It just stayed at the loading screen. I went into fastboot and tried restoring to factory settings after awhile I relized that my phone has no OS.Can anyone help me?

 

[James L]

Who is the original carrier? Unlocked or not? What OS version did it have?