If you never did the 4.3 official update then you can just Odin to 4.1.1, or if you have custom recovery you can flash a 4.1.1 ROM as well.. Pretty sure there's threads on this subject
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4.1.1 LJA firmware and flash in Odin
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Can I flash even if I'm not rooted?
Sent from my SM-N900T using XDA Premium 4 mobile app
Can I flash even if I'm not rooted?
Sent from my SM-N900T using XDA Premium 4 mobile app
Can I flash even if I'm not rooted?
Sent from my SM-N900T using XDA Premium 4 mobile app
Can I flash even if I'm not rooted?
Sent from my SM-N900T using XDA Premium 4 mobile app