Xiaomi Redmi 6 Pro: official and custom methods (2026)

Why do you want to use Redmi 6 Pro and what are the risks?

Xiaomi Redmi 6 Pro (codenamed sakura) is a popular budget smartphone of 2018, which is still in active use. However, over time, official support for MIUI ends, and users face slowdowns, lack of security updates or the desire to install custom firmware like LineageOS or Pixel Experience. firmware can solve these problems, but it is important to understand that the wrong actions will turn the phone into a “brick”.

In this article, we will analyze all the current methods of firmware for the Redmi 6 Pro in 2026: from the official update via MIUI Updater to install custom assemblies via TWRP or Fastboot. Particular attention will be paid to unlocking the bootloader - without it, most custom firmware cannot be installed, and the process has become more difficult after the tightening of Xiaomi's policy.

If you're a beginner, start with the official methods. For experienced users, you can use instructions on how to install Global Stable, EU ROM or custom cores. Remember, the firmware resets all data — back up in advance!

Preparation for firmware: what to do before the start

Before you start firmware, make sure that all the preliminary steps are followed, which will save you from most problems and simplify the process.

First, check the current MIUI and the firmware region. Go to Settings → About Phone. If you have China ROM and you need Global, you'll need a full flash flashing with the bootloader unlocked. Note the Android version: Redmi 6 Pro was released with Android 8.1 Oreo, but supports an upgrade to Android 10 (in unofficial builds, to Android 11).

• 📱 Download the correct firmware: official from the Xiaomi website or custom from the forum XDA Developers. Sakura is a good file tag. sakura_global or sakura.
• 🔋 Charge your phone at least 60%: interruption due to battery drain can damage system files.
• 🔐 Unlock the bootloader (if you plan custom firmware): without this, the majority of alternatives ROM It will not be installed. More details in the next section.
• 💾 Save important data: Firmware erases internal memory. Use Mi Cloud, Google Drive, or physical copying on your PC.

Also prepare your Windows computer (for Fastboot and Mi Flash Tool) or OTG-cable (for firmware through Recovery). Install drivers ADB/Fastboot mi USB Driver - without them, the PC will not recognize the phone in firmware mode. You can download them from the official Xiaomi website or through Android SDK Platform Tools.

Backup contacts and files|Download the firmware for your model (sakura)|Install drivers ADB/Fastboot|Charge the phone. >60%|Prepare the cable. USB (preferably original)-->

Unlocking the bootloader on Redmi 6 Pro: step-by-step instruction 2026

The bootloader on all Xiaomi smartphones is locked by default, a security measure that blocks custom firmware installation, and it takes up to 720 hours (30 days) to unlock due to Xiaomi's policy, so start the process in advance.

Algorithm of action:

1. Link your Mi Account to your phone: go to Settings → Xiaomi Account and log in. Without this, unlocking is impossible.
2. Activate USB debugging: in Settings → About phone tap 7 times on the MIUI version, then go back to Settings → Additional → For developers and enable USB debugging and OEM unlocking.
3. Download Mi Unlock Tool from the official website and install it on PC.
4. Connect your phone to your PC in Fastboot mode (turn off the device, then press Volume Down + Power).
5. Launch the Mi Unlock Tool, log in to the same Mi Account and follow the instructions. The program will show a waiting timer (usually 168 or 720 hours).

After the deadline, repeat the procedure - the bootloader will unlock. Note: unlocking resets the phone to the factory settings and can cancel the warranty (if it is still valid), and some banking applications (for example, Sberbank Online) may stop working due to the lack of a Locked Bootloader.

Official update via MIUI Updater| Fastboot (Mi Flash Tool)| Install custom firmware via TWRP| Not yet decided-->

Redmi 6 Pro firmware methods: comparison of methods

The choice of method depends on your goals and level of training, and below is a comparative table with the pros and cons of each option.

For most users, MIUI Updater or Recovery is optimal. If you want to change the firmware region (for example, from Chinese to global), you will need Fastboot. Castom firmware provides more features (for example, Android 11 instead of the standard Android 10), but requires unlocking the bootloader and experience with ADB.

Important: when you run through Fastboot or TWRP, you run the risk of activating Anti-Rollback, which protects Xiaomi from rolling back on older firmware. If that happens, the phone will lock. Always check version compatibility!

💡

To change your firmware region (e.g., from China to Global), make sure to use the Mi Flash Tool in "clean all" mode. Other methods can lead to errors with IMEI or the network.

Fastboot Firmware: Step-by-step instructions with Mi Flash Tool

This method is suitable for installing official firmware (for example, when switching from China). ROM Global Stable) or phone recovery after a crash, you'll need a Windows computer and the original USB-cable.

Steps:

1. Download the firmware in.tgz format for sakura from the official website. Unpack the archive into a folder without Cyrillic characters.
2. Install the Mi Flash Tool (you can download it here).
3. Put your phone into Fastboot mode: Turn off the device, then press Volume Down + Power before the screen with the hare appears.
4. Connect your phone to your PC and start the Mi Flash Tool. The program must define the device as a COM-port.
5. Select a folder with the unpacked firmware and press Refresh. Make sure sakura appears on the list.
6. Select firmware mode: Clean all - complete cleaning (recommended when changing the region); Clean all and lock - cleaning + lock bootloader (only for official firmware!); Save user data - data storage (not always working correctly).

Flash

If you're stuck at 99% or you have an Anti-Rollback error, you're trying to install firmware older than the current one.

⚠️ Note: You can't interrupt the firmware at the Fastboot stage, it will damage the boot partition. If the phone doesn't turn on after a failed firmware, repeat the process with another version. MIUI.

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If the Mi Flash Tool gives you a “Couldn’t find fastboot” error, try running the program in Windows 7 compatibility mode or manually install the drivers through Device Manager.

Install custom firmware through TWRP: LineageOS, Pixel Experience and others

Custom firmware allows you to upgrade Redmi 6 Pro to more recent versions of Android (such as Android 11), remove unnecessary Xiaomi apps and improve performance. However, the process is more complicated than with official firmware, and requires an unlocked bootloader.

Procedure:

1. Install. TWRP Recovery: Download the latest version TWRP For sakura from the official website, transfer your phone to Fastboot and connect to your PC. Open the command line in the folder with the platform-tools and do: fastboot flash recovery twrp-3.7.0_9-0-sakura.img fastboot boot twrp-3.7.0_9-0-sakura.img

Backup your TWRP

Backup

Boot

System

Data

Sweep through the custom firmware

• Download. ZIP-Firmware file (e.g. LineageOS 18.1) and GApps (if you need Google services).
• Transfer files to your phone via MTP to TWRP.
• In TWRP, select Wipe → Advanced Wipe and select Dalvik, Cache, System, Data.
• Install the firmware through Install, then GApps (if necessary).
• Reboot: The first launch can take 10-15 minutes.

The most popular custom firmware for Redmi 6 Pro:

• 📱 LineageOS 18.1 – pure Android 11 without unnecessary applications.
• 🎨 Pixel Experience – The interface is like Google Pixel + monthly security updates.
• ⚡ Havent OS — Optimized firmware for weak devices (best performance).
• 🔒 MIUI EU — formal MIUI without Chinese services or advertising.

⚠️ Warning: Installing custom firmware can lead to problems with Widevine L1 (downgrade L3), Netflix and other services will only work in the future. 480p. This can only be corrected by returning to the official firmware.

Solving common errors in firmware

Even with accurate follow-up, errors can occur, and the following are the most common problems and ways to fix them.

If after firmware the phone hangs on the MI logo, try:

1. Download to Recovery (Loudness up + Power) and make Wipe Data.
2. Fastboot phone with the Clean All option.
3. Check if the Anti-Rollback is activated (in this case, only the service center will help).

If there's a problem with IMEI (no network, no network, no SIM-Restore it through the engineering menu:

##4636## → Phone Information → Select SIM → Restore IMEI

Or use it. QCN-Recaveri (requires root rights).

FAQ: Answers to Frequent Questions