CustomDroid
Xiaomi

Xiaomi POCO F4 / Redmi K40S

Qualcomm SM8250-AC Snapdragon 870released Jun 2022up to android 16latest android is 17
ro.product.devicemunch

also sold as POCO F4 · Redmi K40S · 22021211RG · 22021211RI · 22021211RC

Xiaomi POCO F4 / Redmi K40S
photo: PixelExperience
Actively maintained

Released Jun 2022, newest ROM build 3 days ago (7 ROMs still current). A phone that still gets updates keeps going long after its manufacturer stops.

Hardware

SoC
Qualcomm SM8250-AC Snapdragon 870
CPU
Kryo 585
GPU
Qualcomm Adreno 650
Architecture
arm64
RAM
6/8 GB
Storage
128/256 GB
Screen
6.67" · 1080x2400 · Super AMOLED
Battery
4500 mAh
Network
2G GSM · 3G UMTS · 4G LTE · 5G NR
Released
Jun 2022

Sensors & features

  • A-GPS
  • Accelerometer
  • Color spectrum sensor
  • Compass
  • Dual SIM
  • Dual-frequency GNSS
  • Fingerprint reader
  • Galileo
  • GLONASS
  • GPS
  • NavIC
  • QZSS
  • Gyroscope
  • IR blaster
  • Light sensor
  • NFC
  • Proximity sensor
  • USB OTG

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

ROMs · 15

The Xiaomi POCO F4 / Redmi K40S (codename munch) has 15 tracked custom ROMs on CustomDroid — including Project Elixir, LineageOS for microG, LineageOS and 12 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 POCO F4 / Redmi K40S 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: OrangeFox · 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/munch

Timeline

  1. Jul 2026
    LineageOS, /e/OS, crDroid, PixelOS, Project Matrixx, Project Elixir, VoltageOS, Paranoid Android, RisingOS Revived, AxionAOSP, Lunaris AOSP 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.