iOS 8.4 jailbreak on 6+ here... As of a few months ago my volume throughout the phone has been at about half. I've already re-booted, resprung, etc. Did the sign out of Facebook trick. Cleaned the headphones port thoroughly and speaker. Went into settings and toggled on Hearing Aids switch, turned the system wide volume all the way up etc. Went into iCleaner and disabled every tweak. I Even tried squeezing the phone right over the external speaker (someone said that works...). Does anyone know any other solution or possible tweaks that would cause this to happen? Thanks in advance!