How to unbrick your SM-G7102

The following guide will get you back to where you should be able to odin everything back to stock.


What you need:

• 16GB or 32GB microSD card (all data will be erased from this sdcard)
• microSD card reader
• Linux Live Disc, Windows can be used, instructions below.
  
  One of the following images based on your software
• 4.4 NG4 SM-G7102 https://mega.co.nz/#!RJoH2Iga!xs1M67...pl_EUwkgeuIBPY

How to get it done:

Linux Instructions

• Boot your Linux OS
• Download the debrick image listed in the Item's needed list
• Open terminal on your Linux OS
• Insert your microSD card into the reader
• Plug your microSD card reader into your computer
• Run
  Code:

  dmesg | tail

  you should see something that mentions where it is mounted via /sdX
• *
  Code:

  dd if=/path_to_debrick.img of=/dev/sdX

  again where X is the microSD card ignoring the partition numbers as they should be overwritten
  I had to do this a couple times for the image to actually take
• *
  Code:

  parted /dev/sdX print

  If you will see Error about the GPT table being corrupt you can type "OK" and then you will be given an option to Fix/Ignore; type "Ignore"
  should show approximately 23 partitions (IIRC)

Windows Instructions

• Download win32diskimager
• Download your debrick image
• Unzip both items and run win32diskimager
• Run win32diskimager
• browse for your extracted debrick image
• Select your microSD in the dropdown box
• Click write

Instructions required for both

• remove the microSD card from the reader
• remove the battery, sim and external microSD card from your device
• insert your debrick microSD into your phone
• insert the battery and down your power button (at this point your phone might actually boot completely and you can recovery any software/data you want)
• reboot into Download mode either via adb or Volume Down + Home + Power
• Once the device is booted into bootloader remove the microSD card.
• follow the directions in the ODIN thread and make sure you UNCHECK partition!

* requires su privileges

Once you have your device booting with the SDcard, youll need to flash the stock odin firmware which you can get from samfirmware.com. make sure you flash teh version or a newer one than what you had, you cannot downgrade.