I can't find the model so all I can offer is for you to find XDA Developers (the forum) and see if they have something newer.
Keep in mind that some take a nose dive in performance but heck, that's not the issue here.
I have an older at&t lg phone and when I try and update to newest android version it says it can't . I'm wondering if I'm just stuck with this or if their is something I can do. Thank you.