I think one ui 4 doesn't matter to many users because it's just going to ruin the performance of samsung m51 just like one ui 3 did ...The only thing users want is CA and some basic features like good lock support...
I think we will get the update in the end of this month.Because i think samsung is going to give one ui 4 in April. There is 3 months gap between Jan to April
M51 is now trashIts lagging to much without update m51 is trash. Samsung giving **bleep** things in update and make phone bugg but not giving important features .