If your HTC 7 trophy mobile phone volume keys not working then 1st check buttons, if thy are ok but problem still then make Jumpers red line make jumper HTC 7 Trophy Volume buttons not working HTC 7 Trophy Volume buttons problem HTC 7 Trophy Volume buttons problem solution HTC 7 Trophy Volume key http://repairphone24.blogspot.com/2014/1...-7-trophy-voluime-keys-jumpers.htmlhttp://repairphone24.blogspot.com/2014/1...-7-trophy-voluime-keys-jumpers.html