HTC's set to launch their first Android M or Marshmallow powered device on October 20th through their www.thc.com/launch/ website. Little is known about the new device and where it will place in HTC's current lineup (i.e. will it replace the HTC One M9 or will it be a midrange model?). The #BeBrilliant hashtag and the coal background of the invitation hints at something diamond-related. We'll have to wait and see.