● Actively maintained — released Jun 2020, newest ROM build 2 weeks ago (3 ROMs still current). A phone that still gets updates keeps going long after its manufacturer stops.
Specifications
- 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
- Released
- Jun 2020
7 custom ROMs available
The Xiaomi Redmi 9 (codename lancelot) has 7 tracked custom ROMs on CustomDroid — including LineageOS, Project Infinity X, /e/OS and 4 more, running up to Android 16. Each listing links to the project's own download and install guide.
New to flashing? It 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. New to this? Why flash a custom ROM or read the guides.
LineageOS publishes an official step-by-step install guide for this device: wiki.lineageos.org/devices/lancelot.
Support timeline
- Jul 2026LineageOS, /e/OS, crDroid, PixelOS, Project Infinity X, Project Elixir, AxionAOSP 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.