Released Jul 2022, newest ROM build 3 days ago (3 ROMs still current). A phone that still gets updates keeps going long after its manufacturer stops.
Hardware
- SoC
- Qualcomm SM8475 Snapdragon 8+ Gen1
- CPU
- Kryo
- GPU
- Qualcomm Adreno 730
- Architecture
- arm64
- RAM
- 8/12 GB LPDDR5
- Storage
- 128/256/512 GB
- Screen
- 6.28" · 2400x1080 · AMOLED
- Battery
- 4500 mAh
- Network
- 2G GSM · 2G CDMA · 3G UMTS · 4G LTE · 5G NR
- Released
- Jul 2022
Sensors & features
- A-GPS
- Accelerometer
- Barometer
- Compass
- Dual SIM
- Dual-frequency GNSS
- Fingerprint reader
- BeiDou
- Galileo
- GLONASS
- GPS
- NavIC
- SBAS
- QZSS
- Gyroscope
- IR blaster
- Light sensor
- NFC
- Qi wireless charging
- Qi reverse wireless charging
- Stereo speakers
- Ultrasound proximity sensor
- USB OTG
Specs from the LineageOS wiki (CC BY-SA 3.0).
ROMs · 06
The Xiaomi 12S (codename mayfly) has 6 tracked custom ROMs on CustomDroid — including LineageOS, LineageOS for microG, /e/OS and 3 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
before recovery: flash boot, dtbo, vendor_boot from the build
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 18 Sept 2026 · checked 21 Sept 2026 - LineageOS for microGOfficialde-GoogledmicroGlast build 18 Sept 2026 · checked 21 Sept 2026
- /e/OSUnofficialprivacy-focusedde-GoogledmicroGlast build 15 Aug 2026 · checked 21 Sept 2026
- LMODroidOfficiallast build 30 Dec 2025 — over 6 months ago · checked 21 Sept 2026
- RisingOS RevivedOfficialmicroGlast build 19 Sept 2025 — over 6 months ago · checked 21 Sept 2026
- crDroidOfficialheavy customisationlast build 1 Feb 2025 — over 6 months ago · checked 21 Sept 2026
RSS feed — subscribe to get new Xiaomi 12S 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 Qualcomm device, so on Windows you'll want the Google USB Driver (and QDLoader 9008 to unbrick) 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/mayfly
Timeline
- Jul 2026LineageOS, /e/OS, crDroid, RisingOS Revived first tracked
- Sept 2026LMODroid, 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.