The speakphone on my iPhone does not work at all and when I put it in headset mode, only the right side works. I think something must have gotten in the headset hole and messed something up, because it worked one day and not the next. Any special remedies or tools that I should know about or should I just go to Apple? Also, this phone was given to me after my friend got a newer one. It's not set up with a plan or anything, but I plan to hook it up in May. Does that mess up some kind of warranty or anything?