How can I unlock my HTC M9 bootloader? Home › Forums › Main Forum › Help › How can I unlock my HTC M9 bootloader? This topic contains 1 reply, has 0 voices, and was last updated by Anonymous 11 months, 3 weeks ago. Author Posts November 4, 2016 at 4:53 pm #732 Anonymous :silly: I have a HTC One M9, all I need to do is unlock it’s bootloader so that I can root it using the chain fire method. Author Posts You must be logged in to reply to this topic.