How to Downgrade/Rollback Oneplus 9RT from OxygenOS 12.1 to OxygenOS 11.3

Here is a guide to Downgrade or Rollback Oneplus 9RT from OxygenOS 12.1 open beta 1 to OxygenOS 11.3. #OxygenOS12 #Downgrade #Rollback #Oneplus9RT Download Downgrade files for Onelpus 9RT: ----------------------------------------------------- Official OxygenOS 12.1 for Oneplus 7, 7 Pro, 7T & 7T Pro FINALLY😍 - Always-On Display & NEW FEATURES: ----------------------------------------------------- OxygenOS 12 - Top Features - Privacy policy - Everything Explained! Oneplus Stealing DATA?: ----------------------------------------------------- 10 Unique & Hidden Features Tips & Trick of OxygenOS 12: ----------------------------------------------------- Android 12 ColorOS launcher vs OxygenOS 11 Oneplus launcher comparison! New features, Changes & More: ----------------------------------------------------- Best free THEMES on OxygenOS 12 for Oneplus Smartphones🔥: ----------------------------------------------------- Website: YouTube: Facebook: Instagram: Twitter: Telegram: