I'm getting a new EPIC 4G Touch on Monday, and I was doing some research and read that officially JB 4.1.2 had been released for it. I looked at the guide in the STICKY about rooting and stuff, as that's what I usually follow to do the stuff, and it looked kinda old so I wasn't sure if it was safe to follow. Also, if the phone I receive is not 4.1.2, should I update it before rooting to 4.1.2 or not upgrade or does it make any difference? I read something freaky on Cyanogenmod somewhere about a bug that causes a superbrick or something of the sort, but I couldn't find any other info about it. Could someone explain what exactly that is to me, as it kinda freaks me out. OH and also, what is a "Modem"? I read stuff about flashign a JB modem vs ICS modem and blah blah. What exactly is that? And are there flaws in using a custom rom with an ICS modem? Thanks so much!