1. Download GT-I9100_OLD_BOOTLOADER.7z from XDA here.
2. Extract GT-I9100_OLD_BOOTLOADER.tar.md5
3. Reboot into Download mode (long press Power Button > Reboot > Download).
4. Kill following Windows processes via Task Manager.
- KiesPDLR.exe
- KiesTrayAgent.exe
5. Connect phone to PC via USB cable.
6. Start Odin3-v1.85
7. Click on Bootloader button and select GT-I9100_OLD_BOOTLOADER.tar.md5
8. Click Start. Once done, it will display a "PASS!" message.
9. Phone will auto reboot.
10. Unplug USB cable.
11. Power-off phone.
12. Insert USB Jig. If successful, "ERASING DOWNLOAD INFORMATION SUCCEEDED" will be displayed.
13. Remove USB Jig.
14. Long press power button to shutdown.
15. Long press power button to boot/start phone.
16. No more yellow triangle!
