Xiaomi Mi Mix 2S

codename polarisQualcomm SDM845 Snapdragon 845released Apr 2018up to Android 15

● Actively maintained — released Apr 2018, newest ROM build 1 day ago (2 ROMs still current). A phone that still gets updates keeps going long after its manufacturer stops.

Specifications

SoC: Qualcomm SDM845 Snapdragon 845
CPU: Kryo 385
GPU: Qualcomm Adreno 630
Architecture: arm64
RAM: 6/8 GB LPDDR4X
Storage: 64/128/256 GB UFS2.1
Screen: 5.99" · 1080x2160 · IPS LCD
Battery: 3400 mAh
Released: Apr 2018

3 custom ROMs available

The Xiaomi Mi Mix 2S (codename polaris) has 3 tracked custom ROMs on CustomDroid — including LineageOS, /e/OS, Paranoid Android, running up to Android 15. 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/polaris.

Android:

LineageOSOfficial
Android 15v22.2by bgcngm
Source: wiki.lineageos.org
Install guide Download
Updated 6 Aug 2026Report wrong data
/e/OSUnofficial
Android 15v4.1.1
Source: doc.e.foundation
Install guide Download
Updated 18 Jul 2026Report wrong data
Paranoid AndroidOfficial
Android 12vSapphireby rtx4d
Source: github.com
Install guide Forum Download
Updated 17 Feb 2022may be staleReport wrong data

Support timeline

Jul 2026
LineageOS, /e/OS, Paranoid Android 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.