What's old is apparently new again for MetroPCS subscribers. Thanks to some leaked training materials over on Howard Forums, we have a pretty clear idea of the next Galaxy S device to bow on that budget carrier's lineup -- the Lightray 4G. No, your eyes aren't deceiving you, we've seen this exact phone before at CES 2012 where it was part of Dyle's Mobile TV showcase. And that chassis you see above? It's a mostly unaltered version o