Default Can 4.3 update using OT be downgraded to 4.1.2 using odin?

The reason is tried to reset binary counter tk zero using triangle away +stock kernel+Boefla kernel n stock firmware 4.3 but FAIL.Thought of trying to dwngrade n try reset counter again just worried will brick my phone if dwngrade using odin as upgraded using OTA.

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SAMSUNG S2-I9100G
SAMSUNG S3 -I9300