Currently Being ModeratedOct 5, 2012 1:09 PM (in response to Hunter_93)
Forgive what may be a dumb question in my part, but you have confirmed that the headphones are fully plugged in? I haven't had hands on an iPhone 5 to check, but with most other Apple devices, the headphones take a pretty firm push to get them fully seated. There's normally a light "snap" that can be felt when they're completely plugged in.
Hope that helps.