I've noticed this problem the past about week and a half too. I have a feeling there may be an underlying issue seeing multiple people are suddenly experiencing it. I've never had this issue before, where an incoming call is picked up by me, they can hear me but i can't hear the other person. Like the others, i've made 0 changes to my network or setup, the issue just started recently. I've also been experiencing this on outgoing calls occasionally too. It is not happening all the time but when it does, i've been having to tell the person on the other end after a few of my "hello"s with no responses back to me, that my phone is messed up and i'll call them right back. I call them back and it works fine. Sigh...