So this is a little bit long but here it goes. The phone with the troubles is my brother's that he purchased from me last November when i upgraded to the 6. When I had the 5S the mic on it was terrible and unless the phone was on speaker people could not understand me on the other side and it sounded muffled with an echo. This phone is still covered under AppleCare+ that I purchased with the phone and was replaced about a month or two ago because of the mic problem. The replacement phone screen would turn blue while being unlocked, so the phone was replaced again. The 2nd replacement phone had both the blue screen issue and the mic problem as well. It was extremely difficult to hear anything while on phone calls. So today that phone was replaced again. Are these common issues with the 5S model? Has anyone experienced anything similar with replacement phones? Today's genius experience was also out of the ordinary as it was unpleasant. The genius was condescending when asked about a new in box replacement due to it being the 3rd replacement phone in less than two months. The genius also took the old iPhone back without offering to remove the Zagg Glass, which was kept on in order to simply transfer to the new one as the previous geniuses had done both times. Between the loss of a $40 screen protector and the bad attitude of the genius when being serviced, the experience was subpar. So what is the best way to contact apple about that? Thank you for your time, help, and responses!