Download iOS 2.2.1

iOS 2.2.1 (2G): http://appldnld.apple.com.edgesuite.net/content.info.apple.com/iPhone/061-5830.20090127.Mmni6/iPhone1,1_2.2.1_5H11_Restore.ipsw
iOS 2.2.1 (3G): http://appldnld.apple.com.edgesuite.net/content.info.apple.com/iPhone/061-5828.20090127.aQLi8/iPhone1,2_2.2.1_5H11_Restore.ipsw