[Redmi K20 / Xiaomi Mi 9T ROMs, Kernels, Recoveries] wadiehabib:
/*
* Your warranty is now void.
*
* I am not responsible for bricked devices, dead SD cards,
* thermonuclear war, or you getting fired because the alarm app failed. Please
* do some research if you have any concerns about features included in this ROM
* before flashing it! YOU are choosing to make these modifications, and if
* you point the finger at me for messing up your device, I will laugh at you.
*/

AncientOS is Custom ROM based on AOSP that aims to provide a unique UI with some useful feautures for customization.

Here are the features which AncientOS provides.

[LIST]
[U][B]Ancient Stuff:[/B][/U]
[•]Refined UI with several OneUI touches and an old vibe with intricate patterns in the Settings App.
[•]Lots of status Bar mods.
[•]Lots of new Status bar icons.
[•]Lots of Headers Styles.
[•]Lots of new Headers Clocks and Date Styles.

[U][B]STATUSBAR:[/B][/U]
[•]Statusbar icons.
[•]Traffic indicators.
[•]4G Icon Instead of LTE.
[•]VoLTE icon toggle.
[•]Clock Customization.
[•]Battery Customization.
[•]Battery Bar.
[•]Old mobile type indication.
[•]Statusbar padding preferences.
[•]Battery percentage while changing.

[U][B]Navigation Bar:[/B][/U]
[•]Navbar invert layout.
[•]Enable/Disable Navbar.

[U][B]QUICK SETTINGS:[/B][/U]
[•]QS brightness slider position.
[•]Battery percentage selection.
[•]Auto brightness icon toggle.
[•]Brightness control buttons.
[•]Quick pulldown option.
[•]Kill app button.
[•]Vibrate on touch.
[•]Blur behind QS.
[•]QS panel Opacity.
[•]Tint QS toggles.
[•]Battery Customization.
[•]QS Header.

[U][B]LOCKSCREEN:[/B][/U]
[•]Lots of new Clocks
[•]Lots of Fonts for Lock, Date and Owner Info.
[•]Lots of new Date styles.
[•]Charging info.
[•]Fingerprint Authentication Vibration.
[•]Unlock keystore with fingerprint after reboot.
[•]Lockscreen Weather.
[•]Lockscreen visualizer.
[•]Lockscreen media art and Blur customization.
[•]Disable Quick Settings panel on secure lockscreen.
[•]Lockscreen charging animation.

[U][B]BUTTONS:[/B][/U]
[•]H/W keys customization.
[•]H/W buttons backlight customizations.
[•]Power Light control.

[U][B]NOTIFICATIONS:[/B][/U]
[•]Headsup Customizations.
[•]Incall Vibrations.
[•]Less boring Headsup.
[•]Headsup snooze & timeout option.

[U][B]MISC:[/B][/U]
[•]Three Finger Screenshot.
[•]Wake on plug.

[U][B]Others:[/B][/U]
[•]Doubletap or longpress power to toggle flashlight.
[•]Vibrate in in-call settings.
[•]RGB Accent picker.

[/LIST]

Download ROM here for your device!

ROM: https://sourceforge.net/projects/ancientrom/files/davinci

Flashing Instructions

CLEAN FLASH :

Download the latest build

Reboot to recovery

Take a backup (Not Necessary, Still its Recommended in case)

Wipe System, Data, Vendor, Cache & Dalvik

Flash latest firmware for your region. DOWNLOAD

Flash the ROM + Gapps + DFE + Magisk (Optional if want Root)

Reboot

DIRTY FLASH :

Download the latest build

Reboot to recovery

Wipe Cache & Dalvik

Flash ROM Zip file + DFE

Reboot

Note : GApps and Magisk is to be flashed every time you Dirty Flash the ROM.

AOSP

LineageOS

SuperiorOS

DotOS

PixelExperience

AospExtended

Syberia OS

Nitrogen OS

Pixys OS

ArrowOS

MSM-Xtended

HavocOS

BootleggersROM

ABC

Rebellion

Komodo

Durex aka Corvus

DerpFest

Evolution-X

OMNIROM

AOSIP

Liquid Remix

Resurrection Remix

Dirty Unicorns

Bliss

ExtendedUI

AICP

MoKee

RevengeOS

Yodita

POSP

ION

crDroid

GZOSP

Colt-Enigma

AncientOS Source

Kernel Source

Telegram Group

Telegram Channel

Telegram Device Specific Group

REPORTING BUGS!

As soon as the problem occurs, take a logcat!

for more READ THIS

If you like our work then please consider donating.

Support Lead Developers: https://www.paypal.me/rezaadipangestu

Support Lead Developers: https://www.paypal.me/baloseribu

Support Maintainer: http://paypal.me/VStore193
​