LG VX-8600 / AX-8600

I had to swap out my phone today for another one at a VZW store (earpiece sounded distorted, even on very low volume). I can't be sure, which is why I'm posting, but I think this new phone has a different software version. This one is T86VZV02. Anyone else care to post what version your phone has? If this is different, anyone know what's changed in the new version? The only thing I've noticed is that I seem to have a stronger signal at home now.

Thanks in advance.