LG cellies can be seen around Jamaica and believe you model is a Quad which is good.........
and you need a Sim card from either Digicel or Lime....Lime sim is $300J's........
but you are going to find out the phone is probably locked to use outside of ATT when you put in a Jamaican Sim card in it...
and the lock codes are not cheap....so you are better off buying a cellie in Jamaica.....or bring down an unlocked quad phone
Cool Runnings Marko