https://forum.xda-developers.com/oneplus-3/oneplus-3--3t-cross-device-development/rom-lineageos-15-1-oneplus-3-3t-t3739169
XDA Forums
[ROM][Official][Nightly] LineageOS 15.1 for OnePlus 3/3T
LineageOS is a free, community built, aftermarket firmware distribution of Android 8.1 (Oreo), which is designed to increase performance and reliability over stock Android for your device...
