Power Button Mic Connector Main Flex Cable For HTC One M8 831C Power Button Mic Connector Main Flex Cable For HTC One M8 831C No instructions manual include. Professional technician is needed for installation. We wont responsible for any damage due to improper operation. *Repair/Replacing old, broken, damaged Power button Flex cable Compatible with: HTC One M8 831C Pacakge include: 1x Power button Flex cable