if it's still under warranty, you can locate an AT&T Device Support Center on their website. if there is one near you, they will swap it out for free, on the spot... no waiting for them to deliver one to your house.
if it's not, consider contacting a repair facility... they'll simply solder a new jack into place as long as that's the only problem.
the site sponsor listing has a few businesses listed.
i'm not a site sponsor, so i cant tell you i do cellphone repairs at $29/hr plus parts.
my av was not safe for preschoolers.