Why Am I able to restore to 4.2.1 BUT NOT 5.0.1??

currently on 5.0.1

been having issues phone decided restore (5.0.1). have shsh blobs saved , have custom ipsw . put dfu mode restore through itunes holding shift , selecting signed ipsw. starts gets stuck on preparing iphone restore until error 1604. tried many times , used ireb no luck.

no other options decided use shsh blobs 4.2.1 , worked fine , im restored 4.2.1 go 5.0.1.


can help???

 

restore using pwned dfu mode.

 

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