Repaire Network samsung i9300

 Root

    Put phone into Download Mode.
    Connect the phone to PC via Micro USB cable.
    Install required driver.
    Select Root_GT-I9300_4.2.x.oct or Root_GT-I9300_4.3.oct firmware file.
    Click "Write firmware" button.

Repaire Network

    Connect the phone to PC via Micro USB cable.
    Install required driver.
    Click "Repaire network" button.
    Follow software instructions (prompts