Ipod touch 4G 4.1 to 5.1.1
I'm upgrading Itouch 4G 4.1 to 5.1.1
Opened up Pwnage 5.1.1 and created a custom 5.1.1 IPSW (using apple 5.1.1 ipsw you get from
http://www.felixbruns.de/iPod/firmware/) .
I put Ipod in DFU mode (not restore mode). I opened Itunes and got this 1600 error over and over like 20 times. I also got not eligible for requested build. I got 11, 1600 and 1604 error notices.
I also added this to my host file.
#74.208.10.249 gs.apple.com
#127.0.0.1 gs.apple.com
btw, those are the only 2 entries that call to apple.
I opened Tiny Umbrella, Had my itouch 4g in DFU mode and pressed "Start TSS Server"
I kept Tiny Umbrella still open. and itouch still in DFU mode. I opened Itunes. It gave me a "this device is in recovery mode and needs to be restored (just ignore that)
I hit ALT and Restore and select custom IPSW that I made through pwnage.
I kept getting "1600 error" notices, but I just closed Itunes and re opened it ... did it 25 TIMES!!!! Remember to keep Tiny Umbrella TSS server running. It will finally go through ...
I hope this helps and saves someone from like 3 days of reading and trying....
Good luck