It started doing this once in a while and now I can't make calls without losing the sound. It happens with every single call. It seems like the speakers go out or the BT connection is faulty. Every call starts fine, both sides can hear perfectly, but a few minutes into the call nobody can hear me at all, I have to take the call on my handset or plug in headphones for people to hear me. This is super inconvenient as often dial in to conference calls for work.