I can make calls from my device and I can drop in on other devices but the folks on the other end cannot hear me. In addition, when I drop in on the device from my phone it says I am connecting to a device that is not voice enabled. Other than this the echo works just fine for everything else. I also have two echo dots that work perfectly for drop in and calling. Thus, I am wondering if there is a fix for this or is my hardware malfunctioning. Any advice is appreciated!