Thanks, ***** ***** try to flash the device via your computer to see if we can get it working
Can you do the following please
Download the firmware you want to install at http://SamMobile.com/firmwares
Once the download is complete, extract the firmware file to a place you will remember, like a folder on your desktop.
Download Odin. Odin is a simple utility that is used to flash firmware to Samsung devices. Here is a link to one source: http://bitli.es/HEZIgA
Make sure your phone is off and disconnected from your computer.
Open Odin. Under Options, only "Auto Reboot" and "F. Reset Time" should be checked.
Click the "AP" (or "PDA") box and browse for the extracted firmware file.
Press and hold the following buttons in order: Volume Down + Home + Power. Keep holding them until you see a screen that says "Warning!!" at the top.
Press the Volume Up button to continue.
The next screen will show the Android logo and say "ODIN MODE" at the top left. The text is very tiny - almost unreadable. So if you can't read it, you are on the right track.
Now connect your phone to your computer via USB.
In Odin, look to the top left and wait until you see in the leftmost box "COM" followed by a colon and a number, such as "COM:4". The number doesn't matter. Once you see that, you can proceed.
In the Message box in Odin, you should see several lines of text.
Press Start in Odin.
Odin will begin processing, and on your screen you will see "Downloading" with a status bar underneath.
When Odin is successfully finished, you will see in the Message box "All threads completed".
Your phone should begin rebooting. You can disconnect from the computer.
Let me know the results please