The MetroPCS LG G STYLO MS631 recently received a new software update which brings the software verison to ms63120j.
The stock kdz firmware for The MetroPCS LG G STYLO MS631 is also now available for download from LG server. Those who bricked their LG MS631 phone can download the stock firmware from below link and use LG UP to unbrick/restore LG MS631 phone back to stock.
Download MetroPCS LG G STYLO MS631 STOCK KDZ firmware MS63120j
To unbrick/restore your LG MS631 back to stock with LG UP, You need to instal latest LG USB drivers, LGUP DLL FOR MS631 and LG UP software.