As some of you may have heard, a recent RadioShack YouTube video inadvertently outted a new LG handset for Sprint. Showing up as a cameo in a clip designed to promote the white Evo 3D, the only thing we had to go on was a name "LG Marquee" and a frontal shot of the phone. Here we are a few days later and we now know this Marquee will actually be a Sprint variant of the Optimus Black. How so? Pocketnow did the legwork here and managed to tie the LS855 model number to other iterations of the Optimus Black using leaked Sprint Cellebrite data.