How to Upgrade Xiaomi Mi 8 SE to the Latest MIUI Version: Full Guide

The Xiaomi Mi 8 SE, launched in 2018, is still popular with users thanks to its compact size, powerful Snapdragon 710 chip and support for modern features. However, with the release of new versions of MIUI and Android, device owners are faced with questions: how to update the firmware, which versions are still supported, and what to do if the update is not installed?

In this article, we will discuss all the current ways to update the Mi 8. SE — standard OTA-Updates to manual firmware via Fastboot and Recovery will focus on the nuances associated with the end of official support for Android 10 (the latest stable version for this model), and alternative solutions for advanced users. If your smartphone “hangs” on old firmware or gives errors when updating – here you will find working instructions and tips for troubleshooting problems.

1. Supported versions of MIUI and Android for Xiaomi Mi 8 SE

Before proceeding with the update, it is important to understand which firmware versions are relevant for the Mi 8 SE in 2026.Official support for the model from Xiaomi ended in 2021, but the development community continues to produce custom firmware.

The latest official version from the manufacturer:

• 📱 MIUI 12.5 (stable) Android 10-based firmware with Xiaomi support (released in 2021).
• 🔄 MIUI 12.6 (beta) - Unofficial ports for enthusiasts, may contain bugs.
• 🚫 Android 11/12 — Not officially supported, but available through custom firmware (e.g. LineageOS or Pixel Experience).

If you want to work smoothly without experimentation, it is recommended to stay on MIUI 12.5 (Android 10). For fans of new features, custom firmware will suit, but they require unlocking the bootloader and may deprive you of warranty (if it is still valid).

2. Preparation of the smartphone for the update

Incorrect preparation is one of the main reasons for the failure of the update. Before clicking "Update", follow the following steps:

Battery charge ≥ 50%|Release. ≥ 3 GB of memory|Connect to a stable Wi-Fi|Make a backup copy of the data|Shut down. VPN antivirus-->

Pay special attention to backup. A firmware update can reset or delete data (especially when you switch to custom firmware). Use the built-in Settings → About Phone → Backup or third-party services like Google Drive.

If you are upgrading via Fastboot or Recovery, additionally:

• 🔧 Install Xiaomi drivers on PC (download from the official website).
• 📥 Download the correct firmware version for your region (e.g, mi8_se_global global version).
• 🔒 Unlock the bootloader if you plan a custom firmware (instruction below).

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If you have custom firmware installed, before upgrading through OTA, return to the official MIUI. Otherwise, you risk getting a "brick" (defaulting device).

Method 1: Air Update (OTA)

The easiest and safest method is to upgrade through the settings menu, which is suitable for switching to a new version within the same MIUI branch (for example, from MIUI 12.0.1 to MIUI 12.5.3).

Instructions:

1. Open Settings → About the phone → System update.
2. Click on "Check Updates." If a new version is available, download it.
3. After downloading, click "Reboot and install".
4. Wait until the process is completed (usually 5-15 minutes).

If the update is not available:

• 🌍 Check the firmware region: your real region should be selected in the settings (for example, “Russia” for the global version).
• 🔄 Try changing the update server through Settings → Additionally. → Region.
• 📡 Connect to another Wi-Fi network or use mobile internet.

Method 2: Update via Recovery

If OTA doesn't work or you want to install firmware manually, use Recovery mode, which is suitable for official firmware in.zip format.

Step-by-step:

1. Download the necessary firmware from the Xiaomi website (select the Mi 8 SE model and region).
2. Rename the file to update.zip and move it to the root folder of internal memory.
3. Turn off your smartphone and press Volume Up + Power to enter Recovery.
4. Select the language, then go to Install update.zip to System.
5. Confirm the installation and wait for completion.

Advantages of the method:

• ✅ It works even if it does. OTA does not find updates.
• ✅ You can revert to the previous version (if you download the old firmware).
• ✅ It does not require a PC connection.

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Updating through Recovery doesn’t reset data, but make a backup before the procedure anyway.

5. Method 3: Fastboot Firmware (for power users)

The Fastboot method is used to completely flash the device, including crash recovery. It requires a PC connection and command line knowledge.

What you need:

• 🖥️ Computer with Windows/Linux and installed Xiaomi drivers.
• 📦 Firmware in.tgz format (download from the official website).
• 🔧 Mi Flash Tool (download from the forum) MIUI).

Instructions:

1. Unpack the firmware in a folder without Cyrillic characters (for example, C:\mi8se_fastboot).
2. Turn off your smartphone and press Volume Down + Power to log into the Fastboot.
3. Connect your phone to your PC via USB.
4. Launch the Mi Flash Tool, select the firmware folder and press Refresh (should appear) COM-port).
5. Select Clean All or Clean All and Lock (if you want to lock the bootloader after you have been firmware).
6. Press Flash and wait until it is completed (the process will take 5-10 minutes).

⚠️ Note: Fastboot erases all data, including photos and apps. If you don't back up, it won't be possible to recover the information.

6. Solving common errors during the update

Even when following the instructions, Mi 8 SE users encounter errors, and consider the most common ones and how to fix them.

If after the update, the smartphone stopped turning on or gives a Bootloop error (infinite reboot), try:

1. Log in to Recovery and do Wipe data (reset settings).
2. Reflash the device through Fastboot with a full cleanup.
3. If nothing helps, contact the service center (possibly damaged device memory).

7.Alternative firmware: LineageOS, Pixel Experience and others

Since official support for the Mi 8 SE is over, many users are switching to custom firmware, offering fresh Android versions (up to version 13), no advertising and additional features.

Popular firmware for Mi 8 SE:

• 📱 LineageOS – pure Android without shell MIUI, steady-work.
• 🎨 Pixel Experience – firmware with interface from Google Pixel.
• ⚡ ArrowOS – Balance between productivity and customization.
• 🔧 Havoc-OS – for lovers of fine tuning.

To install custom firmware:

1. Unlock the bootloader through the official Xiaomi tool (can take up to 72 hours).
2. Install custom Recovery (such as TWRP).
3. Download firmware and GApps (Google services if needed).
4. Fly through TWRP, pre-made Wipe partitions System, Data, Cache.

⚠️ Castom firmware may contain bugs, especially in the operation of the camera or module NFC. Before installing, check the reviews on the forums (for example, XDA Developers).

8. Frequently Asked Questions (FAQ)