How to reflash Xiaomi Mi Max 2: official and custom firmware

Xiaomi Mi Max 2 is a popular 6.44-inch phablet released in 2017. Despite its age, the device is still in demand thanks to its powerful 5300mAh battery and powerful Snapdragon 625 processor. However, over time, factory firmware becomes obsolete, bugs appear, and updates from Xiaomi stop coming out.

This article will help you understand how to reflash the Mi Max 2 with minimal risks. We will look at all the available methods, from official updates via MIUI Updater to install custom firmware via TWRP and Fastboot. Particular attention will be paid to unlocking the bootloader, a mandatory step for most methods, and you will learn how to avoid common mistakes, such as break (turning the phone into a brick) or losing the IMEI.

Preparation for Firmware Reflashing: What You Need to Know Before Starting

Flashing is not just a system upgrade, it's a complete software replacement. Incorrect actions can result in the loss of warranty (if it's still valid), the deletion of all data, or even the device failing. Before you start, make sure that:

• 🔋 Battery charge of at least 60% (better 100%) interruption due to discharge is almost guaranteed to turn the phone into a brick".
• 📱 You have a backup of important data. The firmware erases internal memory, including photos, contacts and messages.
• 🔧 The computer has Xiaomi drivers installed and ADB/Fastboot. Without them, the PC does not recognize the phone in firmware mode.
• 📡 Stable Internet connection (if you download firmware directly to your phone) A download break can damage the file.

Also check the current version of MIUI and Android in settings (Settings → About Phone) to help you choose the right firmware. For example, if you have a MIUI 10 based on Android 7, you can’t install MIUI 14 right away – you’ll need an intermediate firmware.

⚠️ Note: On the Mi Max 2 with a Snapdragon 625 processor, it is impossible to install Android 11 or later by official methods (MIUI LineageOS type firmware can offer more recent versions but with limited functionality (e.g., no full-power camera support).

Official Update Methods: MIUI Updater and Fastboot

If your goal is to simply upgrade to the latest official version without risking losing your warranty, start with these methods. They don't require unlocking the bootloader and keep all the features of the device.

Method 1: Update via MIUI Updater (no PC)

The easiest way for beginners is if Xiaomi is still supporting your model with updates.

1. Open Settings → About the phone → System update.
2. Click on the three dots in the top right corner and select Select Service Pack.
3. If you have an update, download it. If you don't, download the full firmware package (.zip) from en.miui.com and select it manually.
4. Confirm the installation and wait for the reboot.

This method saves all the data, but only works for incremental updates (small patches).If you want to upgrade from MIUI 9 to MIUI 12, you will need full firmware through Fastboot.

Method 2: Fastboot Firmware (from PC)

A more reliable way, suitable for deep upgrades or system repairs, requires a computer and minimal command line knowledge.

1. Download the official firmware for the Mi Max 2 (codename oxygen) from Xiaomi's website. Look for a file with the.tgz extension.
2. Unpack the archive into a folder on your computer, and inside it will be an image folder with firmware files.
3. Turn off the phone and press Volume Down + Power to log into the Fastboot.
4. Connect the phone to the PC and open the command line in the firmware folder.
5. Enter the command to check the connection: fastboot devices If the device is detected, continue.
6. Run the firmware command: fastboot flash all or (for new versions of MIUI): fastboot update name file.zip

⚠️ Note: If an anti-rollback error appears in the process, it means you are trying to install an older version. MIUI, In this case, you need firmware with the same or newer Anti-Rollback number (indicated in the file name, for example, ARBv4).

Download official firmware for oxygen|Install Xiaomi and ADB |Unpack the archive in a separate folder |Check the battery charge (minimum 60%) |Connect the phone in Fastboot-->

Unlocking the bootloader: a mandatory step for custom firmware

If you plan to install TWRP, LineageOS or any other unofficial firmware, you first need to unlock the bootloader. Xiaomi blocks it by default to protect against unauthorized changes. The process takes up to 72 hours and requires a Mi Account to be linked.

Step-by-step instructions for unlocking

1. Link your Mi Account to your phone (Settings → Xiaomi Account).
2. Enable USB debugging (Settings → About Phone → MIUI Version (click 7 times) → Additional → For Developers → USB debugging).
3. Download the Mi Unlock Tool from Xiaomi and run it on PC.
4. Log in to the same Mi Account as on your phone.
5. Connect your phone in Fastboot mode (clip Volume Down + Power).
6. Press Unlock in the program. If you receive a message to wait, wait for the specified time (usually 72 hours).

Once the bootloader is unlocked, the phone will reset to factory settings. All data will be deleted! Also note that unlocking can lead to:

• 🚫 Loss of warranty (if it is still valid).
• 🔒 Disable some features, such as Mi Pay or Find Device.
• 📡 Problems with OTA-Updates (you will need to update manually).

Installation of custom firmware through TWRP

If the official firmware does not suit you, you can install custom, for example, LineageOS, Pixel Experience or Havoc. OS. This will give you access to new versions of Android, but it may deprive you of some features (for example, dual camera or other features). IR-port).

Step 1: Installation of TWRP Recovery

TWRP (Team Win Recovery Project) is a custom recovery that allows you to install informal firmware. For the Mi Max 2, use the version from the developer mauronofrio (proven for oxygen).

1. Download the latest version of TWRP for oxygen from twrp.me.
2. Rename the file to twrp.img and place it in the folder with ADB.
3. Connect your phone in Fastboot mode and execute the command: fastboot flash recovery twrp.img
4. Immediately after firmware, boot to TWRP, holding Volume Up + Power.

Step 2: Firmware custom OS

Before installing custom firmware, it is necessary to:

• 📁 Make a backup of the current system in TWRP (Backup → Select sections → Swipe to Backup).
• 🧹 Run the Wipe partitions Dalvik, Cache, System, Data (if you switch to another version of Android).
• 🔗 Download firmware (e.g. LineageOS 18.1 for Android 11) and GApps (Google services) to your memory card.

Installation:

1. In TWRP, click Install and select the firmware file.
2. Add GApps (if you need Google services).
3. Swipe to Confirm Flash (Swipe to Confirm Flash)
4. After installation, run Wipe Cache/Dalvik and restart.

⚠️ Note: Mi Max 2 with custom firmware often disappears IMEI (To avoid this, save the modem partition to the TWRP (Backup → Select modem. IMEI If it goes away, restore that backup.

💡

If the camera doesn’t work after installing custom firmware, download the GCam module with Snapdragon 625 support. For example, the Arnova8G2 version works well on the Mi Max 2.

Solving common errors in firmware

Even if you follow the instructions accurately, you can have problems, and let's look at the most common mistakes and how to fix them.

If the phone has turned into a hard brick, and even the Fastboot doesn't work, all that remains is the firmware through EDL (Emergency Download Mode).

• 🔧 Special cable (EDL cable) or circuit of the circuit board.
• 💻 Mi Flash Tool and Official Firmware.
• 🔑 Authorized Xiaomi Account (for new devices).

On the Mi Max 2, firmware via EDL is possible without authorization, but requires manual login (closing test points on the motherboard). If you are not sure of your abilities, contact the service center.

How to return the official firmware after custom

If custom firmware is unstable or you want to return the warranty, you can roll back to the official MIUI.

1. Download the official firmware for the Mi Max 2 (.tgz or.zip) from Xiaomi’s website.
2. If you have TWRP installed, run the official firmware through it (Install → Select a file).
3. If TWRP is missing, use Fastboot: fastboot flash all name file.tgz
4. After installation, reset to factory settings (Wipe → Factory Reset in TWRP or via Settings → Reset).

Note that returning to the official firmware will result in the loss of root rights and custom recovery, and you may also need to re-unblock the bootloader if you want to install TWRP again.

💡

Before returning to the official firmware, remove all modifications (Magisk, Xposed) - they can conflict with MIUI and cause errors.

FAQ: Frequent questions about the firmware Xiaomi Mi Max 2