My wife's stereo jack on her iPhone 6 Plus stopped working. We both assumed the jack would need to be replaced. I had a good experience with a screen replacement at All Mobile Matter before, so we brought it in to replace her stereo jack. The employee recommended that she update to the newest iOS to see if that would fix it first. Sure enough, it worked. He could've easily done the replacement to make the sale and not said anything about updating iOS first. Because of his honesty, we were able to resolve the issue on our own for free. Thanks again!