CustomDroid
Xiaomi

Xiaomi Mi 11i / Redmi K40 Pro / Redmi K40 Pro+ / Mi 11X Pro

Qualcomm SM8350 Snapdragon 888released May 2021up to android 16latest android is 17
ro.product.devicehaydn

also sold as Redmi K40 Pro · Redmi K40 Pro + · Mi 11i · M2012K11C · M2012K11G

Xiaomi Mi 11i / Redmi K40 Pro / Redmi K40 Pro+ / Mi 11X Pro
photo: PixelExperience
Actively maintained

Released May 2021, newest ROM build 6 days ago (7 ROMs still current). A phone that still gets updates keeps going long after its manufacturer stops.

Hardware

SoC
Qualcomm SM8350 Snapdragon 888
CPU
Kryo 680
GPU
Qualcomm Adreno 660
Architecture
arm64
RAM
8/12 GB
Storage
128/256 GB
Screen
6.67" · 1080x2400 · AMOLED
Battery
4520 mAh
Network
2G GSM · 2G CDMA · 3G UMTS · 4G LTE · 5G NR
Released
May 2021

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
  • Stereo speakers
  • Ultrasound proximity sensor
  • USB OTG

Specs from the LineageOS wiki (CC BY-SA 3.0).

ROMs · 12

The Xiaomi Mi 11i / Redmi K40 Pro / Redmi K40 Pro+ / Mi 11X Pro (codename haydn) has 12 tracked custom ROMs on CustomDroid — including Project Elixir, LineageOS, LineageOS for microG and 9 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.

Show
Android

RSS feed — subscribe to get new Xiaomi Mi 11i / Redmi K40 Pro / Redmi K40 Pro+ / Mi 11X Pro 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

Custom recovery for this device: TWRP. Flash the one your chosen ROM's guide asks for — common recovery errors.

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/haydn

Timeline

  1. Jul 2026
    LineageOS, /e/OS, crDroid, Evolution X, Project Matrixx, Project Infinity X, Project Elixir, AxionAOSP first tracked
  2. Sept 2026
    PixelExperience, AfterlifeOS, LMODroid, 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.