TWRP (Team Win Recovery Project) is a custom recovery that allows you to flash any custom ROM. You must have TWRP installed before you can proceed. You can download the official TWRP image for your device from the TWRP website . The ROM we will be using requires TWRP 3.2.x or newer.
Do not attempt this on US carrier variants (Verizon, AT&T, etc.) as they have locked bootloaders. Custom Recovery: You must have TWRP Recovery installed.
If you experience rapid battery depletion, calibrate the battery by letting it drain to 0% and charging it uninterrupted to 100% while powered off.
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 samsung s3 custom rom android 10 link
The installation process requires completely wiping your phone’s internal storage. Back up all crucial data first.
Because this is a very old device running a new OS, there are limitations:
Press and hold the buttons simultaneously. TWRP (Team Win Recovery Project) is a custom
ADB sideload (alternative):
By installing Android 10 on your Samsung Galaxy S3, you effectively extend its lifespan, turning an outdated device into a functional media player, dedicated navigation unit, or a capable backup phone running modern software architecture.
While not mandatory to install a ROM, it is often required to install TWRP initially. The ROM we will be using requires TWRP 3
Optional but recommended: Do not wipe Internal Storage or Micro SD Card unless you want to lose your transferred zip installation files. Swipe the slider at the bottom to execute the wipe. Step 4: Flash Android 10 and GApps Return to the TWRP main home screen and tap .
Here are some fictional but working links for illustration:
: Ensure your S3 battery is charged to at least 70% to avoid a mid-process power collapse.