was never just another smartphone. When it launched in late 2018, it turned heads with its nearly 93.4% screen-to-body ratio, achieved by a revolutionary magnetic slider mechanism. Fast forward to 2026, and while Xiaomi has long abandoned official software support (the last stable MIUI was Android 10), the device has found a second home in the custom development community.

Before we dive into the best ROMs, there is a for the Mi Mix 3.

Known for its extreme fluidity and battery efficiency, Axion OS is a top choice for daily drivers who need a bug-free experience and banking app compatibility.

| ROM | Android Version | Antutu Score (v10) | SOT (Hours) | Daily Driver Rating | | ---------------- | --------------- | ------------------ | ----------- | ------------------- | | Stock MIUI 12 | 10 | 320,000 | 3.5 | 2/10 (Insecure) | | | 14 | 380,000 | 5.0 | 9.5/10 | | Pixel Experience | 13 | 375,000 | 4.5 | 8/10 | | LineageOS 21 | 14 | 390,000 (Light) | 5.5 | 9/10 |

The choice of ROM depends on whether you value stability, privacy, or a "Pixel-like" experience. Installing LineageOS on Xiaomi Mi Mix 3 - Andreas Happe

Let’s be honest: Stock MIUI on the Mi Mix 3 has not aged gracefully.