Having problems with custom ROMs? Or perhaps you want to just return your AT&T Galaxy S3 SGH-I747 back to AT&T for warranty purposes?
No worries, it’s easy to unroot/unbrick your AT&T Galaxy S3 SGH-I747 completely back to stock. Follow these directions here and you will be good to go in no time.
If returning your phone for warranty, you can try running TriangleAway app to reset your binary counter. SGH-I747 isn’t supported at the moment by TriangleAway app as of this writing but might be by the time you read this. After that, you can run ODIN, as this unroot method doesn’t increase binary count.
Step 1. Hold down Volume Down, Center Home, and Power buttons together for about 10 seconds.
Step 2. When your screen turns off, let go of the Power button but keep holding down Volume Down and Center Home buttons.
Step 3. When you see the warning screen, hit Volume Up button.
Step 4. Connect a microUSB cable from your phone to computer.
Step 6. Double-click on file “odin3 v1.85.exe” to launch ODIN program. You should see a yellow-highlighted box with a random number. If you don’t download and install Samsung Kies. Then unplug/plug your phone back in.
Step 7. PLEASE DO NOT TOUCH ANYTHING ELSE but click on “PDA”, then choose the file “I747UCALEM_I747ATTALEM_I747UCALEM_HOME.tar.md5” then hit “Start”. THAT’S IT!
Step 8. After about 10-15 minutes, your phone will reboot.
Step 9. Once rebooted, you should find a completely stock ROM back on your Galaxy S3 SGH-I747!
Step 10. If for some reason you get any kind of errors, bootloops, or want to reset everything back to stock, you can do a factory reset.
Hold down Volume Up, Center Home, and Power button together for about 10 seconds.
Step 11. Once the screen goes off, let go of the Power button but keep holding down Volume Up and Center Home button.
Step 12. Once in Android system recovery, choose “wipe data/factory reset”, hit the Power button, then choose “Yes” and Power button again. Then reset your phone.
Step 13. Your phone will reboot and be completely back to Day 1.
Remember, you still have to backup all of your personal photos, videos, and other files in your internal storage/microSD card and erase them if you are going to return your phone for warranty.
Q: ODIN does not start at all.
A: Your Windows computer probably has some driver interference, the quickest solution is to try another computer.
Q: ODIN fails in the middle.
A: Make sure you are not connected to your computer via USB Hub. You can reset your phone back into ODIN Download mode and try again. If all else fails, TRY ANOTHER COMPUTER.