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Downgrading 4.2.1 to 4.1

davidmcc

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I had 4.1 jailbroken and installed a bad program and it created an error so i went back to 4.2.1, but then i wanted to downgrade to 4.1, i did this before and it worked but now when it finally does go back to 4.1 (with extreme effort!) I don't get any carrier info or Network ability only wifi.

I have followed all the instructions available on other sites, i have used Tinyumbrella to save things so i can downgrade (i did this downgrade myself before and it worked ie. 4.2.1 to 4.1 and can't do it again correctly) , can someone show me a site that will show me how do it right?
 

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