Why you can’t update the phone Xiaomi Redmi: a full analysis of the causes and solutions

Update firmware on smartphones Xiaomi Redmi usually takes one click — but what if the system stubbornly refuses to install the latest version? 9 up to the flagship Redmi K60, There are dozens of reasons, from a simple memory deficit to hardware limitations, and in this article, we'll not only list the possible faults, but also give specific instructions for each situation, tailored to the specifics of the situation. MIUI and processor architectures Qualcomm/Mediatek.

We will focus on the hidden nuances: why the update can “hang” by 99%, how to avoid the error “Couldn’t verify update”, and what to do if the phone after a failed firmware stopped turning on. All solutions tested on the current versions of MIUI 14/15 and HyperOS (2026).

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1. Xiaomi servers are temporarily unavailable

The most common reason users don’t know is that the update doesn’t download due to problems on the Xiaomi side.The company regularly runs maintenance on update servers, especially before the release of major versions of MIUI. For example, in December 2023, many owners of Redmi Note 12 complained about the error “failed to connect to the server” – this was due to the migration of data to new data centers in Singapore.

How to check:

• 🌐 Open status.xiaomi.com (official service monitoring) if near the site "MIUI Update Service: Yellow or Red Lights – The Problem Is on Their Side.
• 📱 Try connecting to another Wi-Fi or mobile network, sometimes at the provider level (especially on corporate networks).
• ⏳ Wait 6-12 hours and try again. Usually, the problem is fixed within a day.

If the servers are working normally, but the update is still not downloaded, move to the next section.

2.Lack of free space on the phone

MIUI requires a minimum of 3-5 GB of free space to unpack and install the update - even if the firmware file itself weighs 1-2 GB. The system may not show a warning about the lack of memory, but simply silently reset the process.

How to make the right place:

• 🗑️ Remove the app cache: go to Settings → Annexes → App management, select any application and click "Clear Cache." Repeat for the 5-10 heaviest apps (social media, instant messengers, games).
• 📁 Move files to a memory card or PC, especially video resolution. 4K and RAW-Photos (they can take up 50-100 MB each).
• 🔍 Use the built-in "Cleaner" (in Settings) → He finds the unnecessary. APK-files, duplicates and residual data of remote programs.
• 🚫 Avoid Play Market cleaners (such as Clean Master) that often delete important system files, which can cause updates to crash.

Free seat: 5 GB|Battery charge: >50%|Stable Wi-Fi connection|Lack of active activity VPN/proxy-->

If the update is not installed after cleaning the memory, check the integrity of the downloaded file. Sometimes the firmware is downloaded with errors due to unstable Internet. Delete the update file manually (folder) /Download/rom) And download again.

3. Locking the bootloader (Bootloader)

On all Xiaomi smartphones released after 2017, the bootloader is locked by default, which means that you will not be able to install the firmware unless it is signed with the official Xiaomi key - even if the file is downloaded from the official website.

Signs of locking the loader:

• ❌ Mistake "This" MIUI "version cannot be installed on this device" when you try to upgrade to Recovery.
• ❌ The phone is rebooted in Fastboot with the words "Device is locked".
• ❌ Settings menu → The phone. → Version. MIUI You repeatedly click on the logo, but the inscription “You became a developer” does not appear".

Decisions:

1. Official unlock via Xiaomi's website.You'll need to link your Mi Account to your phone and wait 7-30 days (depending on the model). Redmi Note 10/11 unlocks in 7 days, and Redmi K50 unlocks up to 30.
2. Update via MIUI Updater (unlocked) If the firmware is stable (not beta), the system must install it automatically.
3. Use of the EDL-It allows you to flash your phone through Qualcomm 9008, but requires an authorized Xiaomi account and a special cable.

Errors in checking for updates ("Couldn't verify update")

This error occurs when the system cannot verify the authenticity of the firmware file, most often occurring in three cases:

1. The firmware file is corrupted (unproven or downloaded from an unofficial source).
2. The firmware version is not designed for your model (for example, trying to install firmware for the Redmi Note 11 Pro on the Redmi Note 11 Pro+).
3. The phone has custom firmware (for example, Pixel Experience), and the system blocks the update of official software.

How to fix it:

• 🔄 Download the firmware again only from official sources: Official website MIUI (Choose the region "Global" or "Russia"). Xiaomi Firmware Updater (proven firmware archive).
• 📋 Check the exact model name in Settings → The phone. → A model. For example, a Redmi Note. 10 Pro can be modified: sweet (Global), sweetin (India), sweet_pro (whale).
• 🔧 If you are on a custom firmware, first go back to the stockware MIUI via Fastboot.

If an error appears when you update via Recovery, try an alternative method:

1. Rename the firmware file to update.zip


2. Place it in the phone's root folder (not in the folder!)




3. Enter Recovery (clip Power + Volume up)




4. Select "Install update.zip" (no Wi-Fi connection!)

5. Battery or power problems

Update interrupted by 20-99%? The fault may be unstable power. Xiaomi requires that during the firmware the phone be connected to charging and have a battery charge of at least 50%.

• 🔋 If the battery is worn out (capacity) < 70% of the phone can spontaneously shut down even when the cable is connected.
• ⚡ Cheap chargers or damaged cables can cause voltage drawdowns, leading to failure.
• 🔌 Recovery updates on a discharged phone almost always end with a “Battery low” error".

What to do:

• 🔌 Use the original cable and power supply (minimum 18W). K60 The latest models are recommended for 33 watts.
• 📊 Check battery status via AccuBattery app or built-in diagnostics (Settings) → Battery → Battery status. If the capacity < 70%, replace the battery before upgrading.
• 🔄 If your phone turns off while you're running the firmware, don't panic. Connect it to charge for 30 minutes, then try again. 80 percent of the time, it starts from the same place.

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If the phone gets hot during the upgrade, that's fine. But if the temperature is above 50°C (you can check it with AIDA64), interrupt the process and let the device cool down. Overheating can damage the memory chip.

6. Conflict with custom modifications

If you have previously obtained root rights, installed TWRP, changed boot animations or edited system files, an OTA update will likely not pass, the system detects changes to system or boot partitions and blocks the installation.

Typical errors:

• "This package is for 'sweet' devices; this is a 'sweetin'" → conflict between regional versions.
• "E:footer is wrong" → The header of the firmware file is damaged.
• "Failed to verify whole-file signature" → modified system files.

Solutions for modified phones:

To return to stock firmware via Fastboot:

1. Download Fastboot firmware for your model with Xiaomi Firmware Updater.
2. Unpack the archive in a folder on your PC.
3. Connect your phone to your PC in Fastboot mode (clip Power + Volume down).
4. Launch the file. flash_all.bat (Windows or flash_all.sh (Mac/Linux).

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If your phone doesn't turn on after you've run through Fastboot, try manually flashing the persist.img partition, which often resolves IMEI and network issues.

7 Hardware restrictions (old model or damaged memory)

Some Xiaomi Redmi models have hardware limitations that prevent the upgrade:

• 📱 Redmi 4X/5A/6A and other phones on Qualcomm Snapdragon 425/435 supportive MIUI 13+ Due to lack of memory (all of which are 2–3 GB RAM).
• 💾 Damaged. EMMC-Memory (especially on 2016-2018 phones) Signs: phone accidentally reboots, apps crash, updates "hang" by 0%.
• 🔧 In this case, the phone may not see the firmware or give an error "Invalid sparse file format at header".

How to diagnose:

• Check memory health through AIDA64 (Memory section) If there are bad blocks, you need to change the chip.
• Try flashing your phone through EDL, and if that doesn't work, it's the hardware.

Decisions:

• For older models (Redmi) 4/5) install custom firmware based on Android 10 (For example, LineageOS 17.1). It's lighter than standard. MIUI.
• If memory is damaged, contact the service. The average cost of replacing eMMC on Xiaomi is 3000-6000 ₽.

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Before replacing your memory, check if your model is covered by a warranty. Xiaomi service centers often change eMMCs for free, as long as the phone is warranty (even if it is mechanically damaged).

8. Post-update errors: phone not turning on or glitching

If the update is successful, but the phone:

• 🔄 Hanging on the logo. MI or Redmi.
• 📵 Does not respond to buttons, screen black.
• 🤖 It is constantly rebooted (bootloop).

So the firmware got stuck with errors.

Method 1: Resetting through Recovery

1. Press Power + Volume Up to Enter Recovery.
2. Select "Wipe Data" → "Wipe All Data".
3. After resetting, try to re-update.

Method 2: Fastboot Firmware

If the reset does not help, run the phone manually:

1. Download Fastboot firmware for your model.


2 Unpack the archive in folder C:\MIUI\.




3. Connect the phone to the PC in Fastboot mode.




4 Run flash_all.bat (for Windows) or:




fastboot flash boot boot.img




fastboot flash system system.img




fastboot flash recovery recovery.img




5. Upon completion, enter fastboot reboot.

Method 3: EDL-regime (extreme case)

If your phone is not identified in Fastboot, try converting it to EDL (Emergency Download Mode):

1. Turn off the phone.
2. Press Volume Up + Volume Down and connect the USB cable to the PC.
3. Install the Qualcomm HS-USB QDLoader 9008 driver.
4. Select the Mi Flash Tool (select "Clean All").

If none of these methods worked, there is likely a hardware problem (a boot partition or memory controller is damaged), which requires a diagnostic in the service.

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FAQ: Frequent questions about Xiaomi Redmi update