Before proceeding, ask yourself these questions:
XDA Developers GT-I9300 Forum Section (Search for "LineageOS 17.1 Android 10 ROM for GT-I9300") 3. OpenGApps (Google Apps Package)
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.
Connect your phone to your PC via a USB cable. The ID:COM box in Odin should turn blue, indicating a secure connection.
LineageOS is the most renowned custom ROM in the world, serving as a direct spiritual successor to the legendary CyanogenMod. If you value a stable, clean, and open-source Android experience that closely resembles Google's Pixel devices, LineageOS 17.1 is an excellent choice. The build for Galaxy S3 is developed by XDA Recognized Developer . samsung s3 custom rom android 10 link
The most stable and actively maintained Android 10 ROM for the international S3 (Exynos 4412) is:
Essential for flashing. Get the latest version for your specific model from the TWRP Official Site. 2. Deep Installation Guide Step 1: Install Custom Recovery (TWRP) How to Install Custom ROMS on Galaxy S3!
Copy the and the OpenGApps zip file directly into the internal storage or onto an external microSD card inserted into the phone. Step 3: Wipe the Legacy Operating System
You need the version. Do not use Nano or Stock; the S3’s system partition is too small. Link: https://sourceforge.net/projects/opengapps/files/arm/20220215/open_gapps-arm-10.0-pico-20220215.zip Connect your phone to your PC via a USB cable
Required if you want the Play Store. Use OpenGApps (Select ARM > 10.0 > Pico or Nano).
Unlike modern phones, the Galaxy S3 does not require a complex bootloader unlock. You simply need to flash TWRP.
What is the exact listed under your battery or in your settings?
Boot into : Press and hold Volume Down + Home + Power simultaneously until a warning screen appears. Press Volume Up to continue. If you value a stable, clean, and open-source
The process is well-documented online, but it's essential to follow the instructions carefully to avoid bricking your device.
A custom ROM is a third-party firmware based on Android's Open Source Project (AOSP). It completely replaces the phone's stock operating system, enabling you to run modern Android versions that the manufacturer never provided. The most popular custom ROM in history is CyanogenMod, which has since evolved into —the successor project that breathes life into countless older devices.
While it is incredible to see Android 10 running on a phone from 2012, 1GB of RAM means you need to manage expectations. To make the device snappy and usable as a media player, secondary device, or basic burner phone, implement these adjustments: