[Redmi K20 / Xiaomi Mi 9T ROMs, Kernels, Recoveries] Hack64:
/*
* 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.
*/

Read the whole OP! Be respectful to each other and don't ask for ETAs, it's considered as being rude!

AOSP Extended is an AOSP based ROM which provides stock UI/UX experience with useful customizations. Being based on AOSP it provides a smooth experience. We have added useful customizations from various other open-source projects and have tried to keep our things simple. A ROM by a user, for a user. #BeExtended

#ExtendYourDevice Here are the Extensions! on top of AOSP! We are constantly trying to update the list. Our aim is not to provide all the features available on earth. We aim to add important features that we think should be here and also what you think. For the addition of more tweaks or features, head on to our Telegram community and post the list of features that you want! Features with commits will be more helpful!

- Add and remove status bar items
- status bar clock settings
- Battery Bar otions and customisations
- Traffic Indicators
- Carrier label customisations
- Aex logo on status bar
- Option to enable 4G icon
- Option to disable volte icon
- Option to disable romaing indicator
- Small mobile type icon
- double tap to sleep on status bar
- Brightness control Across Status bar
- QS Tiles vibrations
- Brightness slider along qs panel
- Adaptive brigthness icon
- Brightness Controll buttons
- Option to disable QS settings when screen is locked
- Running services icon in QS panel
- QS pull down customisations
- Quick toggle animations
- Kill app option
- Headsup Settings
- In Call vibrations
- Onscreen navigation bar settings
- Double tap on lockscreen to sleep
- DT2W on Doze
- Media art
- Music Visualizer
- Three finger screen shot
- Theme customisations, (AEX exclusive themes are back)
- Volume Rocker and button options
- Gaming Mode
- Theme and Accents tile
- Caffine Mode
- Cpu Info overlay
- Fps Toggle
- Headsup Toggle
- Micro-G Support added
- Expanded Volume panel added
- Unlink notification and ringtone

NOTE: Few features might be missing in our initial release

And many more coming in the future! Many extensions are added in each update so we miss out adding new extensions to this list.
So always keep on checking the latest changelog on our [URL="https://blog.aospextended.com/"]Official Blog[/URL], and there you can monitor the previous changelogs as well, to see how far we have come!

Download ROM, GApps here for your device!

davinci - non-Gapps

davinci - embedded GApps

Google Apps

-GApps

Want to try this awesomeness?

-Download the ROM and GApps of your choice
- Wipe Cache & Dalvik cache
- Flash AEX Package
- Install GAPPS package
- Format data (FORMAT, NOT WIPE)
- And at last Reboot!
[First boot will take a few minutes! Have patience]
Clean Flash is always recommended!

If you want any bug to be fixed please write here on xda in detail. Give Logcats, mention your device name, mention if any mods and kernels, if used and please be specific about it. By helping us, you are helping yourself too.

->How to take Logcats?

https://goo.gl/UcTM9 and https://goo.gl/J4CSEP

Visit our Website. Subscribe to our Telegram Channel. Also join the Telegram Device Group Chat!

Want to translate to your language? Visit our Crowdin

Want to contribute to the development of this ROM?

Checkout our Github and Gerrit

People behind this amazing ROM!

-@ishubhamsingh(Owner/Dev/Designer)

-JDC Team

-DirtyUnicorns

-LineageOS/Cyanogenmod

-TeamSubstratum

-Nitrogen Project

-Pure Nexus

-OmniROM

-AOSPA

-ABC ROM

-GZOSP Community

-Lakor Tools for Via Browser

-@AlienCreature7, @Wizper99, @Allstargaurav, @Edozullo and @harsh sharma (For designing the ROM Logo, Fling etc)

I guess there is nothing wrong in reading facts!

-Why no "Incremental/Delta updates" Support?

->The updates we provide monthly are heavily changed and modified than the previous builds. New stuff is merged and added. So we don't provide incremental updates and recommend a clean flash.

-How do I root this ROM?

->We recommend Magisk

-Does this ROM Support Substratum?

->Google killed Substratum support in Pie. You can use it, however, you need to be rooted. We don't support rootless Substratum.

-Which Gapps are recommended?

->OpenGapps and BitGappps

-Will this ROM relock the bootloader?

->No.

-What about XPOSED?

->XPOSED is still in the beta stage. We like Xposed but it messes up with the system so before giving any bug reports make sure you have Xposed uninstalled.

-When Will Be the Next Update?

->No ETAs, please. ROM Will be updated whenever the new build is ready by your maintainer. We generally provide monthly updates with the latest security patches and new features.

-Adaway is not working :(

->Download it from here Adaway

-SElinux Linux mode changer app is not working nor Busy Box installer app is working.

->Everything is good with the sources. You should try other things first and then contact your maintainer.

Sources used:

Device Tree: https://github.com/Hack64/android_device_xiaomi_davinci/

Proprietary vendor blobs: https://github.com/Hack64/proprietary_vendor_xiaomi_davinci/

Kernel source: https://github.com/vantoman/kernel_xiaomi_davinci​