I have a Samsung galaxy s3 and I was trying to upgrade the firmware to jelly bean 4.2 with odin v3.07 I followed all the instructions, put the phone in download mode and all that but it didn?t install the firmware and now my phone is just dead, it appears that it doesn?t have any OS at all, when I try to turn it on it just appears the battery charging but it doesn?t appear the percentage of it, it appears an empty battery like it has no charge at all, I put another battery with full charge and it does the same, I also connect it to the power outlet and the LED doesn?t even turn on, also when I connect it to the computer it doesn?t do anything, LED turned off, the screen black and it doesn?t do anything at all. I tried to put it on download mode again and even recovery mode but it just doesn?t do anything. Can anyone please tell me how to fix this and install again the OS?