Preparing environment

First of all you need to have:

• a micro sd card (minimum 1GB)

• a linux-based distro - debian based recommended like Ubuntu 18.04 (a VM works also if you passthrough the usb device)

Follow this instructions when you have the stuff listed above:

• Install these packages :

sudo apt install python3 python3-libusb1 libusb-1.0-0 gcc-arm-none-eabi binutils-arm-none-eabi build-essential

• Download this repo as zip and extract it to your home folder.

• Run this command inside it: make -C shellcode

Then download a good EMMC firmware (also refeered to as 0xf7)(bad is 0xf1) and place it in the i9300_emmc_toolbox folder.

You should also download the SBOOT Bootloader version XXELLA Firmware (extract the sboot.bin file from the .tar and put it inside i9300_emmc_toolbox-master/sdcard)

Get also this file (GT_I9300_unbrick_sdcard_head.bin) sd recovery image

Please follow the according guide for your type of brick:

Type 1 Brick procedure

Type 2 Brick procedure

Type 3 Brick procedure