Redsnow not working to fix no signal problem after upgrade

i upgraded , jailbroke 3gs 5.0.1 , after used redsnow reboot phone stuck on no signal. tried used ultrasnow , redsnow in fixing problem utlrasnow did not work , redsnow keeps going wrong , not being able go way through process. other way signal without having downgrade?

 

what baseband?

 

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