1) After downloading the tools, install the Samsung USB Driver and unzip the file of Stock ROM.
The original ROM file is tar.md5
2) Open the odin and connect your phone to the PC. The device ID will appear in the application interface.
3) In the pit tab on the left side, select the file "I9100_1.5GB-System_6GB-Data_512MB-Preload_by-the.gangster.pit"
4) In AP button, select the tar.md5 file. The odin app will frozen for a few minutes but do not worry.
After this, select start button. WAIT TO TERMINATE, DO NOT PULL THE CABLE
at step 4 i get in odin
<ID:0/006> Odin engine v(ID:3.1101)..
<ID:0/006> File analysis..
<ID:0/006> Set PIT file..
<ID:0/006> DO NOT TURN OFF TARGET!!
<ID:0/006> Get PIT for mapping..
<ID:0/006> Firmware update start..
<ID:0/006> NAND Write Start!!
<ID:0/006> Complete(Write) operation failed.
<OSM> All threads completed. (succeed 0 / failed 1)
now the phone won't turn on get into download recovery etc. when plugged in to pc it says usb not recognized. suggestions?