I use a wired headset that I got for the sony xz1 compact. But I've tried a lot with it and it doesn't depend on the type, it freezes with all of them. If I don't let the screen go black during the call, then phone doesn't freeze either. The only solution I found to keep it from freezing is to start a log collection in logtool. If the log collection is running, the phone never freezes. I find this very strange.
