A new software update build H63120i is now available for the T-mobile LG G Styl H631.
LG official has released the stock kdz firmware for the T-mobile LG G Stylo H631. If you want to install the update manually, You can download the latest firmware for your LG H631 from below link:
Download T-mobile LG G Stylo H631 stock kdz firmware H63120i
LG Server: H63120i_00_1018.kdz
Mega mirror: H63120i_00_1018.kdz
To unbrick/restore LG G Stylo H631 back to stock, You need to install:
Once you installed the LG USB drivers, LG UP and LG UP Dll for LG H631,, Connect your LG H631 to PC VIA USB cable and put your phone into download mode.
Run the LG UP, from the LG UP main screen, select Upgrade, and select the kdz firmware you just download, and then click start to unbrick your LG H631.