Samsung Galaxy S3 headphones do not plug in I have a Samsung Galaxy S3, 2 months old, and I have an issue with headphone.
No, not the ' I can not see the headphones icon ' issue rather the headphones do not plug in fully.  

I tried pressing them slightly harder but still the white metal portion slightly remains outside the body. At that point, the headphones do get detected but a even a slight touch can make them undetected.  

What seems to be the issue here ?  

I tested the headphones on my old Nokia and they are detected fine. I am sensing something has to do with them not going in fully ?
Have you tried plugging in another pair of headphones on your phone? 
If there's a similar problem with plugging in the jack completely, there might be a problem with the jack (female) on the phone. You might want to get it replaced.