How to downgrade ios6 to ios5 using redsnow

Just keep in mind, you can only downgrade a phone that you've ALREADY saved the SHSH Blobs from (meaning you had to have it loaded and actively tried to save it). If you're trying to restore to a version that you never installed before, it won't work.

what can i do to jailbreak my ios 6???
thnk's before

See here: www.iclarified.com/24547/iphone-devteam-details-which-devices-can-be-downgraded-from-ios-6x-to-ios-5x