How to Upgrade Xiaomi Mi TV 4S 55-inch: All Ways 2026

Xiaomi Mi TV 4S 55 (model L55M5-5AS or L55M5-5AN) is still a popular choice even after years due to the combination of price, picture quality and functionality based on Android TV. However, over time, system performance may decrease, bugs appear, and new applications (for example, Disney+ or KinoPoisk HD) require an up-to-date firmware version. Software update solves these problems, but the process has nuances – from choosing a method to recovering from a failed firmware.

In this article, you will find all the current upgrade methods for Xiaomi Mi TV 4S 55 (including models with suffixes -5AS, -5AN, -5X), as well as solutions to common errors: from logo getting stuck to problems with Wi-Fi. We will analyze the official methods (via the Internet and USB), alternative options (for example, through ADB), and explain why the update via OTA may not work on TVs with custom firmware or a modified bootloader. If your TV is "locked" after a failed firmware, there is a section on recovery at the end of the article.

1. How to check the current firmware version on Xiaomi Mi TV 4S 55

Before you upgrade your TV, make sure you really need a new firmware version.

1. Turn on the TV and press the Settings button on the remote.
2. Go to the Settings section → About TV → Software version.
3. Remember or take a picture of a line like MIUI TV X.X.X (e.g. MIUI TV 2.3.65).

Compare your version with the latest official releases on the Xiaomi Support website. If the difference is more than 2-3 updates, it is recommended to update - this will eliminate security vulnerabilities and improve compatibility with applications.

⚠️ Note: On some Mi models TV 4S 55 (prefixed L55M5-5X) The menu may not have the "Software Version" option, in which case use an alternative path: Settings → The device → Television information.

If the TV does not turn on or hung on the logo, the firmware version can be found through the service menu:

• 🔌 Turn off the TV from the socket, then press the Menu button on the remote. + Volume Down.
• 🔌 Connect the power by holding the buttons 10-15 A few seconds before the service menu appears.
• 📝 The Software Version section will specify the firmware (for example, PQM18.2205.01.00).

Method 1: Automatic Internet Update (OTA)

The simplest and most secure method is an over-the-air update (OTA), which is suitable for most users, but requires a stable network connection.

1. Connect your TV to the Internet via Wi-Fi or Ethernet cable (the latter is more reliable).
2. Open Settings → About TV → Update system.
3. Click Check Updates. If a new version is available, the Download and Install button will appear.
4. Confirm the installation and wait for the reboot (usually takes 5-15 minutes).

If the Check Update button is inactive or an error appears that you failed to connect to the server, try:

• 🔄 Reboot the TV and router.
• 🌍 Change. DNS-server on a router (for example, on 8.8.8.8 from Google).
• 🕒 Wait 1-2 Sometimes Xiaomi servers are temporarily unavailable.

⚠️ Note: If the TV was purchased in China (model with suffix) -CN), OTA-updates may be blocked due to regional restrictions. USB (section 4).

After the update, check the performance of key functions:

Is the remote working (sometimes a reconnection is required)

- Connection to Wi-Fi/Internet

- Launching applications (YouTube, Netflix)

- Sound quality (whether there is any distortion)

- Picture settings (will the brightness settings reset)

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3. Method 2: Update through USB-storage device (official firmware)

If OTA Does not work or you want to install a specific version of the firmware, use USB-It's a universal solution, even for a damaged TV (but not for a brick:

• 💾 A flash drive. FAT32 (up to 32 GB).
• 🖥️ Computer for downloading firmware.
• 🔌 Cable USB (better use the port USB 2.0 on TV).

Step 1: Download the official firmware

The official firmware for the Mi TV 4S 55 is available on Xiaomi’s website:

1. Go to support.xiaomi.com.
2. Enter a TV model (e.g. L55M5-5AS) or select it from the list.
3. Download the latest stable version (file with.zip extension).

Step 2: Prepare the flash drive

Format the drive in FAT32 (use the SD Formatter tool for reliability). Copy the downloaded.zip file to the root of the flash drive (not to the folder!) and rename it to update.zip.

Step 3: Install the firmware

1. Put the flash drive in. USB-TV port (preferably back port if available).
2. Go to Settings → About TV → System Update → Update via USB.
3. Select the update.zip file and confirm the installation.
4. Wait until it's finished (it'll take 10-20 minutes) and the TV will reboot automatically.

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If the TV can’t see the flash drive, try using it. USB-externally powered hub – sometimes Xiaomi ports don’t provide enough current for drives.

Method 3: Manual update via ADB (for power users)

If standard methods fail (e.g., due to damaged recovery), you can update your firmware via Android Debug Bridge (ADB), which requires a computer and basic command line knowledge.

What you need:

• 💻 Computer with installed ADB Tools (you can download it here).
• 🔌 Cable USB-A → USB-A (for connecting TV to PC).
• 📁 The firmware in.zip format (the same as for the USB-method).

Instructions:

1. Turn on USB Debugging Mode: Settings → About TV → Software Version → Press 7 times on Software Version until the message “You’ve become a developer” appears. Settings → Additional → Developers → Debugging on USB (enable).
2. Connect the TV to your computer with a cable and check the connection: Adb devices Should appear (e.g. 192.168.x.x:5555).
3. Copy the firmware on the TV: adb push update.zip /sdcard/
4. Reboot the TV to recovery mode and install the update: adb reboot recovery adb sideload update.zip

⚠️ Note: If the adb sideload process is 47% down, it's okay to wait until it's finished (may take up to 30 minutes!

Once installed successfully, the TV will restart, and if you have an E: footer is wrong error, you'll see that the firmware file is corrupted, download it again.

Update with Mi Home (alternative method)

If your Xiaomi Mi TV 4S 55 is connected to the Mi Home ecosystem, you can try updating your firmware through the app, which doesn’t work on all models, but sometimes helps when OTA refuses to work.

How to update via Mi Home:

1. Install the Mi Home app on your smartphone (available for Android and iOS).
2. Add the TV to the app (if it is not already connected).
3. Go to the device section, find the Firmware Update item.
4. If an update is available, click Update and follow the instructions.

Please note:

• 📱 TV and smartphone should be on the same Wi-Fi network.
• 🔄 The process may take longer than through OTA, Because of Xiaomi's intermediate servers.
• ⚠️ Not all Mi Home versions support TV updates – if not, use other methods.

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The Mi Home update is suitable for users who already have a TV integrated into Xiaomi’s ecosystem, a method less reliable than OTA or USB, but can help with Internet problems on the TV itself.

6.Restore TV after a failed update

If the Xiaomi Mi TV 4S 55 doesn’t turn on after the update, hovers on the logo or gives a No command error, don’t panic – in 90% of cases it can be restored.

Method 1: Hard Reset (Hard Reset)

If the TV is turned on but does not load beyond the logo:

1. Shut the TV off the network for 30 seconds.
2. Press the Menu + Volume Up button on the remote.
3. Connect the power by holding the buttons for 10-15 seconds until the recovery menu appears.
4. Select Wipe data/factory reset (use volume buttons for navigation, OK for confirmation).
5. After reset, select Reboot system now.

Method 2: Flashing over USB (if the TV is not turned on)

If the TV doesn’t respond to the remote or is stuck in a bootloop (cyclic reboot), you’ll need a full firmware (not update.zip, but a file with the.img or.tar extension).

• 🔍 Download the full firmware image for your model (see forums) 4PDA or XDA Developers).
• 💾 Prepare the flash drive with the file recovery.img (or fastboot.tar at the root.
• 🔌 Insert the flash drive into the TV turned off, then press Menu + Volume Down and connect the power.
• 🛠️ In the recovery menu, select Apply update from USB and specify the firmware file.

⚠️ Warning: Full flashing will delete all data, including accounts and app settings. If the TV was linked to a Xiaomi account, authorization may be required after recovery.

If none of the methods worked, contact Xiaomi’s service center – possibly a hardware problem (e.g., damaged eMMC memory).

7. Frequent errors and their solutions

When you upgrade Xiaomi Mi TV 4S 55 users face typical problems, here are the most common ways to fix them:

If your error is not listed in the table, check the update log.

1. Connect the TV to your computer via ADB.
2. Enter the command: adb logcat > update_log.txt
3. Repeat the update attempt and examine the file update_log.txt For critical errors (see the lines from the ERROR).

FAQ: Answers to Frequent Questions