I tried to root my GT-I8910N device. The issue is that when i m running odin3 to load the md5 file there is no communication between phone and odin. ( I have no display on ID:COM box....no blue sign!!!!). I have tried the odin 3.04 and 3.07 version, i have tried all USB ports, i have tried to do the whole procedure in another laptop but still the same. Also the same thing happens when i tried to root another device (GT-I8910).