Oreo Stock Images Released For The OnePlus 3 and 3T | DroidForums.net | Android Forums & News
How to Install Official TWRP Recovery on OnePlus 3T and Root it
OnePlus 3T firmware: OxygenOS 5.0.6 available!
Restore to stock: OnePlus 3/3T with latest Oxygen OS firmware [complete Unroot]
Unbrick and Restore OnePlus 3T to Stock Oxygen OS 4.0.3 - DroidViews
June patch via 9.0.4] OnePlus 3/3T Android Pie 9.0 update resumed with OxygenOS 9.0.3, data corruption issue persists (Download links inside) - PiunikaWeb
OnePlus 3T update: August security update released as OxygenOS 9.0.5
Official TWRP Recovery on OnePlus 3 (How to Root and Install)
OnePlus 3/3T recovery lacks password prompt, even after Android Pie (9.0) update - PiunikaWeb