This isn't the first time we've seen the LG Windows Phone LS831. It's appeared on WP Bench and we first caught wind of the device being at the FCC back in October 2011 but only had the FCC ID label to show for it. There's even some speculation this is the LG Fantasy. Now we have pictures (doesn't look like the leaked pics of the Fantasy) and more information that could make the LS831 Sprints new Windows Phone.
FCC documentation on the LG LS831 indicates this Windows Phone support CDMA in the EMSR 800MHz band. A band used by Sprint. The LG Windows Phone also supports the 1900MHz CDMA band. Along with the banding, you also have a Sprint/Nextel Waiver included in the FCC Documentation that ties the mysterious device to Sprint.
As far as device specs, beyond the 5mp camera everything else seems to be a bit of a mystery.
The LS831 appears to have a front facing camera and the screen size could be, what? Four inches? There is mention of a microSD card slot in the owners manual along with instructions on how to check available storage and formatting your microSD card. But based on the side images, I don't see a microSD card slot exposed. Maybe under the hood?
The LS831 definitely sparks interest with all the Sprint connections. That and it's nice to see LG still working on Windows Phones. Could this be Sprints next Windows Phone? Or could the LS831 swing in Verizon's direction?