Released May 2017, newest ROM build 1 week ago (2 ROMs still current). A phone that still gets updates keeps going long after its manufacturer stops.
Hardware
- SoC
- Qualcomm MSM8940 Snapdragon 435
- CPU
- Cortex-A53 & Cortex-A53
- GPU
- Qualcomm Adreno 505
- Architecture
- arm64
- RAM
- 2/3/4 GB
- Storage
- 16/32/64 GB
- Screen
- 5" · 720x1280 · IPS LCD
- Battery
- 4100 mAh
- Network
- 2G GSM · 2G CDMA · 3G UMTS · 4G LTE
- Released
- May 2017
Sensors & features
- 3.5mm jack
- Accelerometer
- Compass
- Dual SIM
- FM radio
- Fingerprint reader
- GPS
- Gyroscope
- IR blaster
- Proximity sensor
- microSD slot
Specs from the LineageOS wiki (CC BY-SA 3.0).
ROMs · 08
The Xiaomi Redmi 4x (codename santoni) has 8 tracked custom ROMs on CustomDroid — including Ubuntu Touch, /e/OS, LineageOS for microG and 5 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 5 Nov 2026.
Tick “compare” on two or three builds to see them side by side.
- /e/OSUnofficialprivacy-focusedde-GoogledmicroG
published as the combined
Mi8937build, which covers this phone — see Xiaomi Redmi 3S / 3X / 4(X) / [Note 5A / Y1 - Prime]last build 27 Oct 2026 · checked 5 Nov 2026 - LineageOS for microGOfficialde-GoogledmicroG
published as the combined
Mi8937build, which covers this phone — see Xiaomi Redmi 3S / 3X / 4(X) / [Note 5A / Y1 - Prime]last build 12 Aug 2026 · checked 5 Nov 2026 - LMODroidOfficial
published as the combined
Mi8937build, which covers this phone — see Xiaomi Redmi 3S / 3X / 4(X) / [Note 5A / Y1 - Prime]last build 18 Dec 2025 — over 6 months ago · checked 5 Nov 2026 - VoltageOSOfficiallast build 19 Sept 2023 — over 6 months ago · checked 5 Nov 2026
- LineageOSDiscontinued
installs with fastboot
per LineageOS's install guide for this device — follow it, not this summary
checked 5 Nov 2026 - crDroidDiscontinuedheavy customisation
files and SHA-256 as published
- build file · v8.4 · 824.69 MB · 10 Apr 2022crDroidAndroid-12.1-20220411-santoni-v8.4.zipsha256 74450cab854f1153116072eed2c75121f295650f3bdb9a51f3ab170ae2f92fd8
What crDroid published 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 10 Apr 2022 · checked 5 Nov 2026 - build file · v8.4 · 824.69 MB · 10 Apr 2022
Linux mobile operating systems — not Android; Android apps don't run natively
RSS feed — subscribe to get new Xiaomi Redmi 4x 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/santoni
Timeline
- Jul 2026LineageOS, VoltageOS first tracked
- Sept 2026Ubuntu Touch, Sailfish OS first tracked
- Oct 2026crDroid, /e/OS, 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.