Now that we have come to the realization that the T-Mobile LG G5 is shipping with an unlockable bootloader you may want to give the LG G5 TWRP a try. It was posted as "Not working", but that was before we knew the G5 bootloader is unlockable. This has not been tested officially and is not known to be working for sure.
It looks like a few files are still needed to make this flashable and ready to use. Rest assured that developers are on the case and this should be working soon. Head to the link below for updates.
via XDA