List of Custom Rom for Xiaomi Redmi 3S/Prime - Root Update
Install Aosp Custom ROM on Redmi 3s/3sPrime - YouTube
AncientOS V6.2 OFFICIAL for Redmi 3S Android 12 Update: 220315 - YouTube
Download and Install Pixel Experience 11 on Xiaomi Redmi 3S/3X [Android 11]
Xiaomi Mi 8, Mi 9, and Mi A2 join the Mi A3, Poco F1, and Redmi Note 8 Pro on the growing Android 10-based PixelExperience custom ROM support list - NotebookCheck.net News