Samsung S3 Custom Rom Android 10 Link [ Firefox ]

Installing a custom ROM requires a full data wipe. Use tools like Samsung Kies to back up your contacts, photos, and all other crucial files to an external drive or cloud storage. Also, create an EFS backup ; this is critical as it contains your phone's unique IMEI number.

Flashing a new ROM completely wipes your device. Back up your photos, contacts, and irreplaceable files to an external SD card or a computer. Download Links: Samsung S3 Android 10 Custom ROM & Files

This specific Android 10 build is designed primarily for the international variant of the Galaxy S3 ( GT-I9300 ). Do not attempt to flash this on carrier-specific US variants (like the SGH-I747 or SPH-L710) unless the developer thread explicitly states compatibility, as you will brick your phone. samsung s3 custom rom android 10 link

This guide is specifically for the international GT-I9300 variant (Exynos processor). Do not flash these files on carrier-locked US variants (like SGH-I747 or SPH-L710).

Pro Tip: Choose the package. The Galaxy S3 has very limited system partition space, and larger packages will cause installation errors. Step 2: Install TWRP Recovery via Odin Installing a custom ROM requires a full data wipe

ARM (The Galaxy S3 uses a 32-bit Exynos processor) Android: 10.0

Ensure your phone has at least 70% battery power. Flashing a new ROM completely wipes your device

Go to the official TWRP website or the dedicated XDA thread for the GT-I9300 TWRP recovery. Ensure you are downloading TWRP version 3.3.x or higher in .img format (for flashing inside recovery) or .tar format (for flashing via Odin). Step-by-Step Installation Guide

For the Samsung Galaxy S III (GT-I9300) and S3 Neo, Android 10 is available primarily through unofficial custom ROMs LineageOS 17.1