But you said in the first post that it was an ATT phone. So I assume that a previous owner unlocked it and exported it to you (and you are in Georgia in the Caucuses rather than in the USA) So while it was unlocked when you bought it, as an ATT phone it was almost certainly originally locked.
In which case, although I don't know this particular model, it is quite likely that you will not receive an over the air update. You might be able to download it from somewhere and update manually using a computer, but I'm not familiar with the process for LGs.