[Xiaomi Redmi Note 4 Questions & Answers] MyNameIsRage:
Hey there joakpa,

Glad to know there is someone who is actually willing to give things a shot. So, I've been using android 8.1 roms since the first one came out and i am happy to share my experience with you. So first things first, regarding your question about your usages of mainstream custom roms like los and rr, there are actually unofficial builds available (not of rr tho) which aren't stable but pretty usable. So regarding of builds available at xda, there are actually 3 types of builds available, first type regards to roms which are purely android, second type regards to roms available with minor customisation, and third is the type of roms available with (almost) full customisation. So regarding the first type, if you want to check out a rom which is pure oreo 8.1 i will suggest you to test out aosppure, because that rom is butter smooth, and doesn't seems to lag. Only thing is that there are two bugs, one volte does not work, and second long pressing the home button does nothing(no google assistant launch) but other than that, the rom is smooth, and really cool. Also i actually didn't mention about the pixel experience rom, because personally i don't really feel like using it, because i am actually not a huge fan of port of operating systems from other devices, and for the most part the device being reffered as "pixel" and not "redmi note 4" sorta bugs me out. Other than that its a nice rom, with bo noticeable bugs, every thing works. Now coming to second category that is slightly customisable roms, and here i would say Cypher os or aoscp wins the round. I have used that rom for about 3 weeks and never had any issues. It just feels right. Now since this rom doesn't provide much customisation, there are not tons of settings to customise. The latest build has an option to set dark theme and it also says button customisation (which i havent tested out yet). No bugs , atleast according to me, and if you want something which pure lineage os provides, this is something worth trying. Now the last section focuses on customisation, and here two names currently stand out, Nitrogen os and AOSP extended. Both of these roms have lots of options to play with, but if you ask me aosp extended is better than nitrogen os since it provides better performance on a day to day life, (i have performed benchmarks on most of the oreo 8.1 roms which can be found here https://xdaforums.com/redmi-note-4/how-to/benchmark-result-custom-roms-t3725767.) So basically both roms provide same features and i am currently using aosp extended ( build date 01/01/2018) and this is actually the most feature packed and stable rom based on 8.1 as of now. Plus it has oms and dui support. I will personally recommend you to test this rom. No bugs found, rock solid rom.

Now the conclusion, depending on your preference, i will suggest you to check out aosppure, (or pixel experience if the bugs bug you out :P) aoscp, and aosp extended.

Let's just hope lineage os 15.1 gets official and resurrection remix oreo comes out soon.

Till then, aosp extended is going to be my daily driver.

Hope this post conveys some meaning to you.

With love,

From india <3

---------- Post added at 08:40 PM ---------- Previous post was at 08:30 PM ----------

Yes you can re install miui, anytime you want ans still get updates, just make sure you flash the miui rom correctly. Also you can use miui with magisk, but twrp can be a bit unstable on global build, if you really want to use twrp along with miui i will recommend you to install the developer version of miui 9

---------- Post added at 08:42 PM ---------- Previous post was at 08:40 PM ----------

It is a server related issue which is being addressed by xiaomi as of now, will be fixed in a week, till then happy flashing :P

---------- Post added at 08:43 PM ---------- Previous post was at 08:42 PM ----------

Contact customer support since this can be related to hardware.

---------- Post added at 08:44 PM ---------- Previous post was at 08:43 PM ----------

Its a server error, which is being fixed by xiaomi.