Is there a way to restore my Samsung Galaxy S3 (SCH-i747)?
I'm in the same boat man..all my research has led me to needing to jtag.  I ordered the download jig, new battery and charger.  Tried on several systems including xp to no avail.  I'll be sending it into Mobiletechrepairs on account of I'm sending in an old phone to cover the cost so I might be out of pocket for shipping.  Wish I was able to find someone local but most phone repair shops don't know what jtag is!  I'll let you know the turn around time and what condition my phone gets returned in.  Good luck.