Am i update my iphone 3gs from ios 5.0.1 to ios 6 without itunes??

I dont speak english but i do all that i can for you can understend me! please help me im new in iphone my problem is when i put my ihpone to restore, i dont know why but I always say: 319i4 unknown error. if I could help them greatly appreciate it! I have an Iphone 3gs 32gb with ios 5.0.1 and want to upgrade ios 6 is old-rootrom and I being able to jailbreak