I have a iphone 3g from 2008 with 4.2.1. I used redsn0w to jailbreak it and at the same time I checked a box to bring the baseband from 05.15.04 to 06.15.00, which I read was necessary for unlocking. During the operation (after I saw a pineapple) the phone blacked out and on startup got stuck on the apple logo startup screen. I tried to restore her with itunes to a custom 4.2.1 but it gave me a 1604 error. After trying to restore to various ipsws and using tiny umbrella to kick out of recoveries, I've gotten a handful of different errors (1600, 1002) and no success. I'm sometimes stuck on the itunes screen, sometimes the logo, sometimes the emergency call screen. Any help for this rookie would be really appreciated, thanks!