I have been searching forums all day and cannot find anything on my specific problem.
I currently have my iPhone 4 jailbroken with limera1n.(firmware: 4.1; baseband:02.10.04-ICE_2_8) I am trying to upgrade/restore to 4.2.1 using tiny umbrella v4.30.04.
I have downloaded iPhone3,1_4.2.1_8C148_Restore.ipsw and when I try to restore in itunes(v10.2.1.1) I get the error code "...the firmware file is not compatible."
I have my SSH blobs saved for 4.1; 4.2.1, 4.2b3, and 4.3
I cannot solve the error but I am starting to think I need an older version of itunes. Any help would be appreciated.