My headphones wont work when i use with with my LG When I plug my headphones in (I have apple headphones) the icon shows up for a second then disappears. How do I fix this?
It's very likely there's something wrong with the 3.5mm jack. My brother had the same problem, he'd have to replace the jack but it was better to just replace the phone since it was an older one.

Test the headphones with some other music device, like an MP3 or radio and see if the same problem persists. This way you can be sure there's nothing wrong with your headphones.