For around 2 weeks now i cannot use my speakers in any way, including speakerphone, ringer from calls and when watching videos. The strange thing is that my sound will intermittently come back for a second or two then disappear again. This seems to suggest that my speakers aren't actually broken, but that there is a problem on the software end of things. Could this be related to JB? If anyone has any ideas please let me know, i'm going crazy with no speakerphone but i also don't want to lose my jailbreak & tweaks