I think the headphones are defective that came with the phone. They kept turning the volume down and up by itself and wouldn't let me turn off the screen until I unplugged them. When I got a phone call with headphones in their was loud static and the person on the other end could hear it. When screen was on I could watch the volume going up or down, I got the phone two days ago. Do you think t-mobile would do anything about that? Do they sound defective?