Hi A friend (after 11.12, never before) started noticing that people could not hear him during calls, but a reboot would fix that (he was not pressing the mute button). I told him that i had never seen that problem, nor reports about it. Today, it happened to me, and i also tried the dictate function in swype, or the voice search app, and my phone did not register any sound. I tried also with a bluetooth handsfree, same result. Wired handsfree, idem. I am trying to find a way to fix it without a reboot, but havent been able to.