Xiaomi’s smartphone firmware is a process that can both bring a device back to life and turn it into a “brick” if you approach it without preparation. Unlike the usual update through Settings → About Phone → System Update, full flashing requires knowledge of the nuances, from unlocking the bootloader to choosing the right version of MIUI for a particular model. This article will help you figure out which firmware method is right for you – whether it’s an official update via MIUI Updater, manual installation via Recovery or low-level recovery via Fastboot.
It’s important to understand: Xiaomi is actively blocking the ability to firmware unofficial builds on new models (starting with the Redmi Note 10 and Mi 11 series), and the process of unlocking the bootloader now requires a wait of up to 168 hours (7 days). However, even with these limitations, there are legal ways to upgrade or restore the device.We will look at all current options, including firmware through the device. EDL (for “brick” devices) and installation of custom firmware on supported models.
Before you start, answer three key questions:
- What is your Xiaomi model (exactly called Redmi Note 12 Pro+ 5G)?
- What is your goal: updating, recovering from a crash, or installing custom firmware?
- Are you ready for a possible loss of warranty (when unlocking the bootloader)?
1. Official ways to Xiaomi firmware without unlocking the bootloader
If your goal is simply to upgrade your smartphone to the latest version of MIUI or restore it after a software failure, start with the official methods. They do not require unlocking the bootloader and keep the warranty.
Update via MIUI Updater (OTA)
The easiest and safest way is to upgrade to the Over-The-Air, which is suitable for devices that are already working but require upgrading to a new version of MIUI.
- Go to Settings → About the phone → System update.
- Click Check for updates.
- If the update is available, download it (it is recommended to connect to Wi-Fi).
- After downloading, click Reboot and Update.
⚠️ Note: If the update weighs more than 1.5GB, it is full firmware. ROM), Don't interrupt the process, it can lead to a hang on the Mi logo. Average installation time: 10-20 minutes.
Manual installation via Recovery (for recovery)
If the smartphone is not turned on or stuck on the logo, but the bootloader is not locked, you can flash the official firmware through Recovery Mode.This method is suitable for devices with an unlocked bootloader or models released before 2021 (where the lock is not activated by default).
Instructions:
Download official firmware (fastboot or recovery) from the website [en.miui.com](https://en.miui.com/download.html)
Rename the file to update.zip and place it in the root of internal memory
Turn off the phone.
Clip Volume Up + Power to Enter Recovery
Select Install update.zip and confirm installation
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⚠️ Note: New models (Redmi Note 11, POCO X4 Pro and newer Recovery Mode can block unofficial installation ZIP-Use only official firmware from the Xiaomi website.
Once the firmware is successful, the device will automatically restart, and it can take up to 10 minutes to turn on the first one, which is normal.
2 Unlocking the bootloader: a mandatory step for custom firmware
If you plan to install LineageOS, Pixel Experience or other custom firmware, the first thing to do is unlock the bootloader. Xiaomi has made this process more complicated: it now requires a binding Mi Account and a wait of up to 7 days (168 hours).
Step-by-step:
- Download Mi Unlock Tool (official software from Xiaomi).
- Log in to your Mi Account on your phone and unlock tool.
- Put the phone in Fastboot mode: turn it off, then press Volume down + Power.
- Connect your smartphone to your PC and launch the Mi Unlock Tool. The program will show the remaining latency.
- After 168 hours, press Unlock.
⚠️ Note: On Redmi Note 10 and later, unlocking the bootloader resets all data (including internal memory). → Additionally. → Backup and reset.
What happens if you break the unlock?
3. Firmware through Fastboot: for power users
Fastboot is suitable for installing official firmware on devices with an unlocked bootloader or for restoring brick-and-brick machines. Unlike Recovery, here the firmware is installed through a computer, which gives more control over the process.
Tools required:
- 🖥️ Windows computer (64-bit system recommended)
- 📱 USB-cable (original, without damage)
- 🔧 Platform Tools (ADB and Fastboot)
- 📄 Official firmware in.tgz or.zip format (download from the [en.miui.com](https://en.miui.com/download.html))
Instructions:
- Unpack the firmware in the folder with Platform Tools.
- Turn your phone into Fastboot mode (Loudness down + Power).
- Connect it to your PC and check the connection with the command: fastboot devices must display the serial number of the device.
- For firmware, run the command (for Windows): fastboot flash all or for new firmware (with division into vendor, system): fastboot update name file.zip
⚠️ Note: On models with a division of A/B (for example, POCO X3 Pro, Redmi K40) Use the command fastboot flash all --skip-secondary, Otherwise, the firmware will end in error.
fastboot flash boot boot.img
fastboot flash system system.img
fastboot flash vendor vendor.img
It takes longer, but often saves you when you make mistakes.
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4.Firmware through EDL: Last Chance for 'Bricks'
Emergency Download Mode (EDL) is a flashing firmware mode that is used when the phone is not turned on, not detected in the Fastboot, and does not respond to buttons. Unlike standard methods, EDL allows you to flash the device at a low level, even if the bootloader is locked.
⚠️ Attention: For firmware through EDL You need an authorized Xiaomi account (for new models) or a special box (for example, UFi Box, EasyJTAG). IMEI communication module.
Short algorithm (for experienced users):
- Download firmware in.mbn format (for example, for Qualcomm chips).
- Install the QDLoader HS-USB Driver 9008.
- Put your phone in EDL mode: For Qualcomm: Test Point pin closure (disassembly required). For Mediatek: button combination (depending on model).
Mi Flash Tool
QFil
📌 Important: On models with Snapdragon chip 8 Gen 1/2 (Xiaomi 12/13 series, Redmi K50) firmware EDL Without authorization, Xiaomi will lead to an error. SLA Auth Fail.In this case, contact the service center.
5. Install custom firmware: LineageOS, Pixel Experience and others
Custom firmware gives access to pure Android, regular updates and additional features, but installing them requires an unlocked bootloader and often lacks warranties. Popular options for Xiaomi:
- 🤖 LineageOS - stable firmware with minimalist interface.
- 📱 Pixel Experience – a port of proprietary Android from Google Pixel.
- ⚡ ArrowOS – Balance between productivity and customization.
- 🔄 MIUI EU — formal MIUI without Chinese services.
General installation algorithm:
- Unlock the bootloader (see Section 2).
- Install custom Recovery (such as TWRP or OrangeFox).
- Download firmware and GApps (if you need Google services).
- Select Recovery: Wipe → Format Data → Yes Advanced Wipe → Dalvik, Cache, System Install → Select ZIP firmware Install → Select ZIP with GApps (if necessary) Reboot System
⚠️ Note: Dynamic Partitions (DYNAMIC Partitions, for example, POCO F4, Redmi Note 11 Pro+) pre-stitch ROM You need to disable encryption through the command:
fastboot format:ext4 userdataOtherwise, the system will not boot after installation.
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6. Frequent firmware errors Xiaomi and their solutions
Even when following instructions, users encounter errors, and let's look at the most common ones and how to fix them.
| Mistake. | Reason. | Decision |
|---|---|---|
| Couldn't verify device (in Mi Unlock Tool) | Mi Account is not tied to phone or 168 hours have passed | Check that the phone and tool share the same account. |
| Anti-rollback check fail | Trying to flash the old version of MIUI after the new one | Just run a newer firmware or the same version. No rollback. |
| This package is for"xxx" devices; this is a"yyy" | The firmware is not suitable for your model. | Download the correct version from en.miui.com. Check the device codename in Fastboot with the fastboot getvar product team. |
| phone is stuck on startup Mi logo after firmware | Incompatible firmware or interrupted process | Repeat the firmware via Fastboot or EDL. If it doesn’t work, check the integrity of the downloaded file. |
| Invalid sparse file format at header | A damaged firmware file or incorrect command | Download the firmware again. For new devices, use fastboot update instead of fastboot flash. |
💡 Advice: If after the firmware disappeared IMEI If the network is not working, restore it through QCN-file (for Qualcomm) or NV-Data (for Mediatek) This will require a backup made prior to firmware.
7.How to check firmware success and avoid problems in the future
After the firmware, you need to make sure that the device is working correctly.
- 📶 Network and Calls: Check signal strength, call capability and SMS.
- 🔋 Charging: Make sure the phone is charging and determines battery percentage.
- 🎵 Sound: Test speakers, microphone and 3.5mm connector (if available).
- 📷 Camera: Take a photo on the main and front cameras.
- 🔐 Biometrics: Set up fingerprint and facial recognition (if supported).
If you have installed custom firmware, additionally check:
- ✅ Google Play Services (launch Google Play Store).
- ✅ SafetyNet certification (via SafetyNet Test application).
- ✅ Performance in benchmarks (Geekbench, AnTuTu).
📌 Recommendation: After a successful firmware, make a full backup through TWRP Or OrangeFox, which will help you quickly restore the system in case of a failure.