You can try this method, but last time i tried it won't work. So I give up since is not critical for me.

http://en.miui.com/thread-440609-1-1.html

Its normal that without anything apps running my ram already used 50% .

Last time i tried miui dual apps.
But wasap got problem, cannot play downloaded media in dual mode.

Changed to parallel space, the issues gone.

*During miui 8 first stable release.

yup. working great.

Stable version but it is for Kate.
Not Kenzo, for Kenzo it is 8.2.1 and still in developer rom.

My kenzo still on 8.2.2.0

Mine oredi 8.2.3, just updated yesterday.. The update was only around 57mb.. 
So far the only changes i seen is that it solves my irregular occurance of memory leak..

Clean updates?

Successfully updated to 8.2.4 but don't know what bug did it fix?

Manually upgrade to 8.2.3.0 , gps still suck

Have you try disable high accuracy?

A fix to notification shade only.
No major updates

the auto brightness never worked for me. So I had it disabled.

Just tested it just now and yeah..still not working properly for me.

Updated but not android nougat. Still version 6. So sad

They say will come. But so far RN3 in the list
List of MIUI 9 Eligible Devices That Will Receive Update
Xiaomi Redmi Note 3
Xiaomi Redmi 2 Prime
Xiaomi Redmi 3
Xiaomi Redmi 3S
Xiaomi Redmi 3A
Xiaomi Mi 4s
Xiaomi Mi 4c
Xiaomi Mi 4i.
Xiaomi Mi5
Xiaomi Mi Max
Xiaomi Mi Note
Xiaomi Mi Pad 2

yes, i received it.. downloading right now 

[attachmentid=8926958]

Stable version out

so far so good...when u restart ur phone..if ur sim card need unlock..their layout design got little change..
but one thing i dont like is icon background is white..i seriously dont like it at all..

Hmm... My redmi note 3 cannot pair with mi band 2, have to pair with other phone.
Thanks anyway.

Thanks all for your suggestions, lazy to troubleshoot since other phone can use.
Luckily bought it cheap during promotion.