Originally Posted by mannequin
you have a defective unit, try to exchange if possible.
Sent from my LG-D801 using Tapatalk
Agreed - someone/something has knackered your socket.
I hammer mine and it's still perfect.
You could try a little "Contact Cleaner/Lubricant" such as Servisol - this will clean any poor contacts if they exist. Is the problem limited to one earphone set? Some plugs are "not great".