Does your Samsung Galaxy S3 indicate issues after updating it to Android 4.22 or 4.3? Here is how to downgrade your Galaxy S3 back to stock Android 4.1.2 ROM. Of course, downgrading your OS version probably never will be an exciting thing, but sometimes it is unavoidable, especially if the new OS unusable on your device.
Downgrading your firmware is just like manually installing a new firmware; just use an older firmware version instead of new version. Just follow below guide to downgrade your Galaxy S3 to Android 4.1.2.
– Android 4.1.2 firmware for Galaxy S3 (download from Sammobile or directly from here)
– Odin v3.07 for flashing firmware (Download from here)
– Samsung Drivers for S3 (Install Samsung Kies)
– USB Debugging enabled in Developer Options
– Backup your phone data (contacts, sms, etc.)
Disclaimer: Please follow this guide at your own risk. We can’t take responsibility for anything that goes wrong. This guide is intended for technically talented users only.
1. Extract (use 7zip) the downloaded firmware zip file. You will get.tar.md5 files.
2. Power off Galaxy S3 and boot into Download Mod by pressing Volume Down + Power and Home button simultaneously.
3. Run Odin on your PC and connect S3 to your PC via USB cable. Wait until Odin recognizes your device (until a blue box appears)
4. Make sure only F. Reset Time and Auto Reboot boxes are checked on Odin. Do not check any other boxes. Also, the re-partition box shouldn’t be checked.
5. Now, proceed by selecting the PDA option in Odin’s Files [Download] section. Pick the update file from desktop.
Note: if you have multiple files, just plug them into the appropriate boxes in Odin.
6. Start the update operation by clicking on “start”. Once the procedure is complete, your S3 will restart and you’ll be back your old firmware.
How to solve boot loop issues?
If your S3 does not boot, enter into Recovery Mode by pressing Volume Up + Power + Home button simultaneously. Now, perform Data Wipe/Factory Reset and Wipe Cache Partition. Then select “Reboot System Now” That’s all!