Today, The T-mobile LG G Stylo H631 received a new software date which brings the device’s software version to H63120k. It is still the Android M OS with February 2017 google security patch.
The LG G Stylo H631 Stock kdz firmware build H63120k is also available for download from LG server. If you want to install the update with LG UP, or unbrick/restore your LG G Stylo H631 PHONE with latest stock kdz firmware with LG UP, You can download the firmware from below link.
Download T-mobile LG G Stylo H631 Stock kdz firmware H63120k
Model: LG H631
Software version: H63120k
Download: /H63120k_00_0203.kdz
TO unbrick/Restore LG H631 back to stock, You need to install:
Learn how to use LG UP to flash kdz firmware onto your LG H631, check this guide,