I have an iPhone 5 and ShureSE215s. Few days ago the right ear phone in my se215 stopped working in the gym. I didn't think much of it, was just going to get an exchange. JR (music website that I bought these off from) some reason want me to ship my old pair back before I get a new pair (lol I know) which makes no sense to me. Anyways, I decide to test out the se215s again, and they work perfectly fine with my laptop jack. However when I plug it into my iPhone 5 jack, both earphones work but the sound is very muffled and fuzzy. What is wrong? Is it the se215 problem or the iphone 5 jack? If it is the iPhone 5 jack do I need to replace the whole phone again? I had to replace it once already due to the charging jack not working.