Table of Contents
How To Boot Samsung Galaxy S3 Neo (GT-I9300i) From Sd Card
Requirements:-
You need a 16G sd card
win32diskimager-1.0.0-install.exe Unbrick file  For Samsung Galaxy S3 Neo (GT-I9300i)Odin the latest version - Stock Rom for your phone.
Procedure
Install Win32DiskImager
Unzip the Debrick.zip file then you find the debrick.img
Plug the sd card into the computer and format it with Win32DiskImager
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look for the debrick.img file and write to the memory card.
Insert the memory card into the phone, insert the battery and press the keys ( Volume Down + Home + Power ) to enter DOWNLOAD MODE.
Remove the memory card and open the Odin flash ROM stock.