iPhone 4S unlock problem after downgrade

hi,

first apologize if make similar post...

have 1 problem iphone 4s has activated but...

used absinthe mac 0.4 , finished per tutorial ,
installed cydia , installous....

after when inserted sim asking activation...
there os 5.0.1 9a406 downgrade 9a405 in order success unlock etc..
after downgrade asking activation , can't bypass it..

tried run absinthe mac 0.4 said have activate before run.

used itunes 10.5.3 (lion 10.7) firmware , did backup of iphone can't restore it...

how bypass activation screen ?

tried redsn0w , hactivation didn't work... need advise
did screw changed ipsw?
know there no custom ipsw 4s

 

you can't downgrade 4s. need authorized sim past activation screen. cingular, at&t gophone or regular, h2o. can inactive sims.

 

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