My iPhone 4 earphone socket isn't working?

The earphones are walking perfectly fine. I know this because they are normal on other devices. The socket hasn't got dust in it.

A quick try to see if they have some dirt is to use a Q-Tip and just regular rubbing alcohol and clean the socket, also put some on the plug and plug it in and out a few times. The alcohol won't hurt as we sue it to clean the contacts on $1K circuit packs. It is much better than the cleaning fluid you pay a bundle for. If that doesn't help and it just quit working, you could have a connection broken on the inside. I don't know if you can take the iPhone apart or not, but if you aren't used to working with that type of stuff you would be better off to take it to a repair shop and see what they would charge you to fix it.

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