By using the recommended and following the careful, step-by-step Odin guide, you can safely and successfully install the official firmware. Stick to the later builds like I9300XXUGOC1 for the most stable and bug-free experience. Your trusty Galaxy S3 can once again run the software it was truly meant to shine with.
These sites archive original Samsung firmware files. You should choose the version that matches your country or carrier's for the best compatibility: By using the recommended and following the careful,
If your device hangs on the Samsung logo for more than 10 minutes after flashing, pull the battery out, reinsert it, and hold Volume Up + Home + Power to enter Recovery Mode. Select Wipe Data/Factory Reset , then reboot. This clears conflicting cache data from your previous Android version. These sites archive original Samsung firmware files
While the resumed update was more stable, the initial rollout tarnished the perception of Android 4.3 on the Galaxy S3. Many users continued to report issues with the official builds, describing them as "not that of a 'clean' rom and has bugs". Reports of lag, reduced battery life, and random app crashes were common enough that the update was considered by some to be less stable than the older 4.1.2 builds. As a result, some users preferred to stick with Android 4.1.2 or upgrade to newer community-developed ROMs for better stability, especially with the later 4.4 KitKat releases. This clears conflicting cache data from your previous
Press and hold the buttons simultaneously.
Running official Android 4.3 firmware in the modern era presents challenges: