Xiaomi Redmi 9
lancelotalso sold as Redmi 9 · Redmi 9 Prime · M2004J19C · M2004J19G · M2004J19I
Released Jun 2020, newest ROM build 2 days ago (5 ROMs still current). A phone that still gets updates keeps going long after its manufacturer stops.
Hardware
- SoC
- Mediatek Helio G80
- CPU
- Cortex-A75 & Cortex-A55
- GPU
- ARM Mali-G52 MC2
- Architecture
- arm64
- RAM
- 3/4/6 GB
- Storage
- 32/64/128 GB
- Screen
- 6.53" · 1080x2340 · IPS LCD
- Battery
- 5020 mAh
- Network
- 2G GSM · 3G UMTS · 4G LTE
- Released
- Jun 2020
Sensors & features
- 3.5mm jack
- Accelerometer
- Compass
- Dual SIM
- Fingerprint reader
- Galileo
- GLONASS
- GPS
- Light sensor
- Proximity sensor
Specs from the LineageOS wiki (CC BY-SA 3.0).
ROMs · 10
The Xiaomi Redmi 9 (codename lancelot) has 10 tracked custom ROMs on CustomDroid — including Ubuntu Touch, LineageOS, /e/OS and 7 more, running up to Android 16. Each listing links to the project's own download and install guide, and was last checked against the projects' catalogues on 21 Sept 2026.
Tick “compare” on two or three builds to see them side by side.
- LineageOSOfficial
installs with fastboot
per LineageOS's install guide for this device — follow it, not this summary
Needs a specific stock firmware first — check LineageOS's install guide
last build 19 Sept 2026 · checked 21 Sept 2026 - /e/OSUnofficialprivacy-focusedde-GoogledmicroGlast build 15 Aug 2026 · checked 21 Sept 2026
- Project Infinity XOfficialheavy customisationlast build 21 Jul 2026 · checked 21 Sept 2026
- LineageOS for microGOfficialde-GoogledmicroGlast build 3 Jun 2026 · checked 21 Sept 2026
- AfterlifeOSOfficial
files and SHA-256 as published
- vanilla · v8.2 · 28 Dec 2025AfterlifeOS_lancelot-8.2-serenity-official_20251228-vanilla.zipsha256 a578613dddf2b81b4ef9eaa0c34ed68c7702cc3ac81b213d6531ad98fd96c8ca
What AfterlifeOSpublished when we last checked. Verify the file you download against the hash on the project's own page; if they differ, don't flash it.
last build 28 Dec 2025 — over 6 months ago · checked 21 Sept 2026 - vanilla · v8.2 · 28 Dec 2025
- crDroidOfficialheavy customisationlast build 15 Feb 2025 — over 6 months ago · checked 21 Sept 2026
- PixelOSDiscontinuedPixel-stylelast build 8 Jul 2023 · checked 21 Sept 2026
Linux mobile operating systems — not Android; Android apps don't run natively
RSS feed — subscribe to get new Xiaomi Redmi 9 builds in your reader · JSON
Before you flash
Flashing generally means unlocking the bootloader, booting a custom recovery, wiping, then installing the ROM. Exact steps differ per device and ROM, so follow the Install guide for the one you pick, and back up first. Check what can break (banking apps, DRM, carrier features) and how to get back to stock before you start. Why flash a custom ROM · All guides
This is a MediaTek device, so on Windows you'll want the MediaTek USB VCOM (preloader) driver before your computer will see it in fastboot. Which USB drivers you need.
LineageOS publishes a step-by-step install guide for this device: wiki.lineageos.org/devices/lancelot
Timeline
- Jul 2026LineageOS, /e/OS, crDroid, PixelOS, Project Infinity X, Project Elixir, AxionAOSP first tracked
- Sept 2026Ubuntu Touch, AfterlifeOS, LineageOS for microG first tracked
Dates show when CustomDroid first indexed each ROM for this device, not when support originally launched.
ROM availability and links come from each project. CustomDroid indexes builds, it doesn't mirror them — always download from the official project, verify the file's hash/signature, confirm it matches your exact codename, and back up before flashing.