The past 2 days, my iPhone 4S has been acting up. It has been working perfectly since the day it arrived (October 14). I have been frequently having no service errors lately. If I turn on Airplane Mode and then turn it off again, my service comes back. Also, when listening to music, I have an option between iPhone and iPhone speaker. If I click iPhone, nothing happens and it stays on iPhone speaker. I don't have anything in the house that uses Airplay, so I don't know why it would show up.