Ok, been researching this 'till I'm blue in the face. I know iPhone 5 did not come with "Phone Noise Reduction". That came on the 5s. But from everything I gather, so long as the iPhone 5 is update to iOS 7 or greater, this feature should be there. My wife's iPhone 5 has been updated to iOS 9. But alas, still no Phone Noise Reduction. It's on my 5s under General->Accessibility->Hearing. But can't find it anywhere on the 5. I just started traveling so we're spending more time on the phones. And I told my wife last night that with the kids, dog, etc., when I'm on the phone with her, it's like I have my head in a big metal can full of nuts and bolts with someone shaking the thing nonstop. For the sake of my sanity, my children's safety, and my marriage, someone PLEASE HELP! Thanks so much.