Heres my situation... Lastnight, I was in Cydia downlaoding a patch for the MMS tethering for Tmobile. As soon as it rebooted the phone, I had the feeling the it will be stuck on the apple logo. So I tried restoring it again with my custom 3.1.2 FW using MAC. I did the option+restore and as soon as it about to restore it, it gave me the 1600 error message... So searched this forum and went to youtube for the "1600 error". The solution I came up with is to run the Redsnow 9.0... I tried running the program at first but could not get it to run properly as my phone is stuck in Restore mode and could not put it in DFU mode (connect to itunes logo). I tried pressing the power and home button so many times and it eventually put me in the DFU mode (connect to iTunes logo) and it completely ran the Redsnow process. Problem is... It still giving me the annoying "1600 error" message. What am I doing wrong?