To start off I am currently using a HTC Evo 4g Okie, so everytime I plug-in my headphones into my HTC Evo 4g and listen to music it just keeps changing songs for some reason. I even lock my phones and it starts doing that. If I don't listen to music and my headphones are plugged in then it starts calling people or using voice dialer for some reason. If anyone can help I would really appreciate it!!!