Upgrading to 4.2.1 from 4.1 3gs

[denn1812]

Hello everybody,
I have a such problem:
I had 4.3.3 on my Iphone 3gs. I had saved blobs 4.1 and 4.3.3. I wanted to get 4.2.1 but i knew that i cant. I doungraded to 4.1 and now are trying to update to 4.2.1. but cant cuz always i see the 3194error. Tried everything except another computer. I have a question: is it possible for me to upgrade to 4.2.1 if i dont have shsh blobs saved??? should i go and check on another computer? or it's just impossible??

P.s i want to upgrade by custom firmware(snowbreeeze).
Thank you

[denn1812]

can anybody answer on my question??

[Simon]

Without SHSH you cannot go to 4.2.1. Why not just restore to a custom 4.3.3 firmware?