I'm on my 3rd Pre. My headset speaker doesn't work for phone calls, I have to use the speakerphone. Before I thought it was because my phone was getting to hot because I would use it as a router for an extended period of time. So I just brought it back and got a new one, twice. I've only had this Pre for 2 weeks and the speakers only work for certain things. Main issues; headset speaker doesn't work on receiving/making phone calls and speakerphone speaker doesn't play youtube videos or music. My speakerphone speaker still plays alert sounds and what not. I've done a full secure erase and the problem still wasn't resolved. Any suggestions?