Simon that would be awesome except in my last post I said that neither of them will update through itunes. I have tried to update by just hitting update and putting them into restore mode and choosing 4.2.1. None of this started until I downloaded the newest Redsn0w a few days ago.
Try this:
Open tiny umbrella
Click on advanced
Deselect box that says set hosts to cydia on exit
Click apply and close tiny umbrella
Proceed with the update/restore
I got an iphone 3g its on fw 4.2.1 baseband 6.15.00 and it randomly just got into recovery mode... I tried restoring it with custom firmware made through pwnage tool and through resn0w. when i used redsnow it just ends up stuck saying "reason: image not found" i am not very familiar with using tinyumbrella, after i deselect the box in tiny umbrella and apply it, what do i do?