I upgraded from the 5s to the 6s on Friday. In the car I use an aux port to play music from my iphone to the car stereo. On the 6s, I occasionally get static on the line that I never got on the 5s (or before). I hear it more when connecting to an internet app (such as facebook, or an email pull). It's not very loud, but I do notice it. I've tried two different 3mm cords, thinking one may just be cheaper and not have enough shielding, but I am hearing it on both. It seems to be an intermittent problem, sometimes it happens, sometimes it doesn't, and I don't get it on my iphone earbuds. Has anyone else seen this? Thanks.