My phone is also the Unlocked Snapdragon variant. And yes mine still does not have the December security patch so I am on November's. I have a Verizon SIM
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Trust me, I am beyond frustrated with Samsung too. I have been checking every day for a new update ever since A12 came out, but nope the unlocked versions just dont matter I guess. Flagship phone went to junk. I want to move to Apple now solely because of this terrible fix. But, I was able to get mine fixed through smart switch. I have an Unlocked S21 Ultra that had tremendous lag when scrolling due to version BUK7. Can confirm the fix is in BUKF as I just updated it. If you download Samsung Smart Switch on your PC you can get your phone updated back to butter smooth.
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