Hey all, fairly experienced JBer here. (JB iphone 3gs and current 4) I read about AT&T snagging people who are tethering without being signed up for their hotspot/tether plan and thought it would be wise to upgrade to 4.3 and JB again. http://modmyi.com/forums/t/755025-t-detects-tethering.html Anyway, now there is a JB for 4.3.1, i figured i'd upgrade from my JB 4.2.1 which has been working PERFECTLY for some time. I've enjoyed a JB phone for over a year now and only use 2 JB apps. MyWi and Infinidock. I followed all instructions for using the PwnageTool and JB appeared to work with zero problems. then I notice that there was not an "e" or "3G" or carrier in upper left corner. I tried to make a call, and it wouldn't work. I tried the JB again. same result. I read about redsn0w JB tool and tried using that. same result. I tried to restore via itunes to unJB 4.3.1. keep getting error 1013 or 21. these 2 suggest security software blocking access to gs.apple.com...but i don't have any security software. had a test version of mackeeper, but uninstalled that. turned off the apple firewall in settings too. I've read all steps that Apple suggests in their support pages to get around those errors and tried all but the "restore on another computer" step. http://support.apple.com/kb/TS1275 i downloaded the restore for 4.2.1 but cannot restore to that fileset. I'm basically stuck with a phone in recovery mode that is useless. Do i have the elusive "brick" now or is there a way to get around this? I've had a problem in past where I went into the console and circumvented the apple servers for confirming a phone in the past, but that was awhile ago and i have no idea how i did /what i did back then. searches online for jailbreak error 1013 and other related searches are turning up zero helpful tips that work. Any suggestions?