Walkie talkie works fine for me most all the time. My only issue is that every time I use it it adds myself as a walkie talkie contact. I remove myself on the watch and in the watch app on the phone but just re adds me when I use it again. This does not happen on my wife’s or any of my friends. I don’t understand why it does this as it won’t let me talk to myself lol! I’ve rebooted both the watch and my phone at the same time but keeps happening. My next option is to reset and set up as new watch. I really don’t want to do that. This is on a series 4 by the way.