hello..first i would like to apologize if posting in wrong forum...ok i have a iphone 3gs ios 5.0.1(modem firm-05.16.05) i would like to jailbreak it.my question is should i upgrade to 5.1 or 6.1...i do like the 5.1.1,and how do i upgrade to 5.1.1.or if i should upgrade to ios 6.1.if so is there a untethered jailbreak for 6.1..