Just a few days ago, Samsung’s Galaxy S 5 was rooted and the method was made available to the public, thanks to XDA developer, Chainfire. Now, the HTC One M8 is next in line as developers at Team Win Recovery Project have already created the TWRP for the Sprint, AT&T and International variant of the HTC One M8.
The custom recovery for the Sprint variant is already available on Team Win’s webpage, however the International version hasn’t been posted over there. So to get it, you’ll have to head to the XDA developer page linked at the end of this article. If you’ve rooted before, the method is pretty similar.