Can you backup old 4.1 blobs on 4.2.1?

[youknowwhoibee]

I have searched and searched through all JB guides but I cant seem to find a definitive answer to this question...

Back Story
I previously had an I4 with 4.1 and jailbroken with limerain. The phone ran flawlessly and I never thought to upgrade to 4.2.1. Well there was a hardware concern with the phone and Apple replaced it with an OEM I4 4.2.1.

I did save my SHSH blobs from 4.1 in Cydia but not with TinyUmbrella. I decided to do the tethered JB since I dont reset my phone much but it is running slooooowwwww. When I initiated Cydia, I didnt get the option to "Make Life Easier" and it already recognized my google account that is registered. .

Do you believe that since Cydia has already recognized my username... I would be able to back up the SHSH blobs from 4.1? I know this is a long shot but I just hate this 4.2.1 JB and want 4.1 badddd

Thanks for the help and sorry if this is a repeat question.

[jokerg7]

I don't believe u can. from my understanding shsh blobs are only device specific

[Simon]

You cant use your 4.1 SHSH from your previous device. They are device specific.

[youknowwhoibee]

I figured as much but I thought I would atleast ask. I have read reviews of 4.2.1 JBing about no speed issues but this thing lags so bad and I have to press applications twice for them to launch (first time is blank screen, second launches).

Anyways... Thanks for the help. I will keep stabbing at a solution or wait for a new JB to hopefully resolve my issues.