I have a Samsung Ativ S Windows Phone 8 and am using the Skype app, however whenever I am in the call and I choose Speakerphone, when I change it back to the headset there is no sound. You can switch it back to speakerphone and it will work again, but still no headset sound. The problem will remain until you restart the phone/app. Anyone know of a way to get around this? Let me know if anyone else is having the same problem!