So I'm new to this whole smart phone thing. I got my phone last night in light of my env2 dying on me all the sudden. I just plugged in earbuds into the 3.5mm (or whatever it is) jack at the top of the phone & the sound still comes out of the phone speaker..? What do i need to do to hear the sound in the earbuds? I'd think it'd happen right when u plug it in.