OTA-Updates to Xiaomi: A Complete User Guide

Have you ever noticed how your Xiaomi smartphone suddenly offers to install a “new version”? MIUI» Or "security update"? That's what it is. OTA-Update is a mechanism that allows a device to get the latest version of the firmware "over the air" without connecting to a computer. But what is behind this process? Why do some users update without problems, and others face "bricks" (defaulting devices)?

In this article, we will discuss OTA-Xiaomi updates under the microscope: from the principles of operation to hidden nuances that are not written in the official instructions. You will learn how incremental and complete updates differ, why sometimes firmware weighs» 3 GB, and sometimes everything. 500 MB, and what to do if the update hangs on 50% We're going to make a mistake with the error "Can't verify update, POCO and flagships Xiaomi 13/14, wherein the process is.

What is it? OTA-Updates and how they work for Xiaomi

OTA (Over-The-Air) is a technology that wirelessly delivers firmware updates directly to a device over the Internet, and in Xiaomi’s case, there are two types of updates:

• 📱 Incremental (delta) – contain only changes between the current and new versions MIUI. They weigh little (50 to 500 MB), but require that the device already has a specific firmware installed.
• 💾 Full - includes the entire firmware (1.5-3 GB) Suitable for installation on any version MIUI, It takes up more space and takes longer to install.

The update process on Xiaomi takes place in 3 stages:

1. Download: The update file is loaded in the background (you can track it in Settings → About Phone → MIUI Update).
2. Verification: The system checks the checksums of the file and compatibility with your model, and here often there is a Can't verify update error, and we will discuss its causes below.
3. Installation: The device reboots to recovery and applies changes, and at this point, you can't interrupt the process, because the risk of turning the smartphone into a brick is maximum.

It is important to understand that Xiaomi uses a phased rollout, which means that the new firmware first becomes available to 1-5% of users (usually owners of flagships), and after 1-2 weeks – to the rest.

Why do we need to? OTA-Update: 5 Real Reasons

Many users treat updates as a “must” and put them off for months, but there are good reasons to install the latest versions of MIUI:

• 🛡️ Fixing vulnerabilities: B 2023 yearly MIUI was closed 12 critical holes that allow remote access to the device, such as vulnerabilities CVE-2023-24567 Allows attackers to bypass screen lock via Bluetooth.
• 🔋 Battery Optimization: Redmi Note 12 Pro+ post-update MIUI 14.0.5 Autonomous life increased by 15% due to optimization of background activity of applications.
• 📸 New camera features: Xiaomi 13 Ultra update added Dolby Vision mode HDR for video and improved night photography processing.
• 🎮 Support for new standards: for example, MIUI 14 brought Bluetooth support LE Audio for headphones Xiaomi Buds 4 Pro.
• 🚀 Productivity: B POCO F5 After updating to Android 13, the number of lags in games decreased due to the optimization of drivers GPU.

But there is a downside: sometimes updates bring new bugs, for example, MIUI 14.0.3 for Xiaomi 12T has a problem with random reboots when connecting to 5G.

⚠️ Note: If your device is unlocked (unlocked bootloader), some of the OTA-You may not be able to install updates, so you'll have to manually run it through fastboot.

How to check and install OTA-Xiaomi update

The process of installing an update on Xiaomi seems simple, but there are nuances that are not mentioned in the official guides.

1. Check Update availability: Go to Settings → About Phone → MIUI Update. If the update is available, you will see the Download button. If not, click on the three dots in the upper right corner and select Update Package (sometimes helps force the firmware to be pulled from the servers).
2. Download: Use only Wi-Fi – when downloading via mobile Internet, the file may become corrupt. If the download is interrupted, clear the Update app cache (Settings → Applications → Application Management → Update → Storage → Clear the cache).
3. Installation: After download, press Install. The device will reboot to recovery. Don't turn off the power - the process can take up to 10 minutes. If the screen is out and does not turn on for longer than 15 minutes, this is a sign of a failed firmware (read the section "What to do if the update is suspended").

For POCO models (e.g., POCO X5 Pro), the path to updates may be different: Settings → About Phone → Software Update. Also in some regions (e.g., India) updates come later than in the global version.

Common errors in the case of OTA-Updates and how to fix them

Even experienced users sometimes have trouble updating, and here are the most common bugs and specific solutions for each:

• 🚫 Can't verify update: Causes: corrupted update file, mismatch of firmware region (e.g., try installing Global on China) ROM), Or modified system markup (if you have removed system applications) Solution: Download the full firmware or recovery package from en.miui.com. update.zip And put it in the root of the memory. + Power to enter recovery and select Install update.zip.
• ⏳ Update hung 0%, 50% or 99%: If progress doesn't move for longer than 20 minutes, chances are the process is "locked." Don't try to wait - that won't help.Solution: Forced reboot phone (press Power for 10-15 seconds). If the phone doesn't turn on, try logging in to fastboot (Loudness down). + Meals) and to provide the full version MIUI via Mi Flash Tool.

After the update, the phone is constantly restarted (bootloop)

This is due to kernel or module conflict, most commonly found on custom recovery (TWRP) devices.

Decision:

1. Log in to fastboot and execute the command: fastboot erase userdata (this will reset the settings, but save the files in memory).
2. If it doesn’t work, run the fastboot firmware to clean all partitions (clean all in the Mi Flash Tool).

⚠️ Note: If you are using root or Magisk, please uninstall the modifications via Magisk Manager before upgrading. → Complete Uninstall, otherwise you may be at risk of getting bootloop.

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If the sound is gone or the camera is not working after the update, try resetting the application settings (Settings → Applications → Application Management → Three Dots → Resetting).

OTA vs. hand firmware: what’s best for Xiaomi

Many users are wondering whether to wait for OTA or manually stitching? Here's a comparison of the two methods:

Manual firmware is justified in three cases:

1. You want to switch from China ROM to Global (or vice versa).
2. Your device does not receive an OTA due to regional restrictions (e.g., the Redmi K50 for China is not updated in Europe).
3. You want to install custom firmware (like Pixel Experience or LineageOS).

For manual firmware you will need:

• 🖥️ Computer with installed ADB/Fastboot and Mi Flash Tool.
• 🔌 Cable USB (preferably original).
• 📄 Firmware in.tgz format (for fastboot) or.zip (for recovery).

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If you're a beginner, start with OTA. Hand-held firmware requires understanding the processes and always carries the risk of turning your phone into a brick.

How to roll back OTA-Update if it ruined the phone

Sometimes fresh firmware causes more problems than benefits, such as battery drains, interfaces fail, or mobile network shuts down altogether, and then you can roll back to the previous version of MIUI. Here's how to do it:

1. Find the old firmware: Download the desired version from the Xiaomi Firmware Updater website: 📌 Device model (e.g. diting for Redmi Note 12 Pro)+). 🌍 Region (Global, EEA, China, India). 🔢 Android version (for example, 13 or 14).

Install through recovery

Rename the file to update.zip, Put it in the root of the memory and go to recovery. + Select Install. update.zip.

Reset the settings.

After rollback, run Wipe data in recovery, otherwise system file conflicts are possible.

Important: rolling back to the old version will reset all data (photos, messages, applications).

⚠️ Note: Some models (e.g. Xiaomi) 12S Ultra) rollback to the old version MIUI This can block the bootloader, which requires official unlocking via the Mi Unlock Tool (it takes 7-30 days).

Hidden chips OTA-Xiaomi updates you didn’t know about

OTA-Xiaomi updates have a few non-obvious features that can be useful for advanced users:

• 🔍 Hidden Logs of Updates: After Installation OTA file /sdcard/MIUI/ota/log Recovery.log and update.log files are saved, and they contain detailed information about the update process, including errors.
• 📡 Compulsory verification of updates through ADB: If OTA It is possible to “push” the system with the command: adb shell cmd jobscheduler run. -f com.android.updater 999 This will force Updater to immediately check the servers for new firmware.
• 🔄 Installation OTA Custom firmware: If you are using LineageOS or Pixel Experience, but want to go back to the MIUI, You can try to install OTA To do this, you can run the original Xiaomi recovery. Install it. OTA via adb sideload update.zip.

The chance of success is about 60%, but it’s better than a full flash through fastboot.

Extracting files from OTA-packet

File. update.zip — It's an archive that you can unpack. Inside you'll find it:

• payload.bin is the main image of the firmware.
• file_contexts — SELinux rules.
• compatibility.zip — compatibility.