Unlocking Xiaomi M1805D1SG: All the ways to remove the locks on Mi TV 4S 43"

Xiaomi Mi TV TV 4S 43" with model number M1805D1SG It remains a popular choice due to its value for money ratio, but many users face blocking issues. This can be a bootloader, a link to your Mi Account after a reset, regional restrictions, or even a lockdown after a failed update. Unlike smartphones, unlocking Xiaomi TVs has its own nuances – the standard Fastboot does not work here, and official tools often require confirmation from the manufacturer.

In this article, we will analyze all the current methods of unlocking for the model. M1805D1SG (clutter USB, Bypassing the Mi Account, removing regional restrictions and recovering from the “brick”). Particular attention will be paid to the unique method of unlocking through the service menu using the remote from Xiaomi Mi Box - this method is rarely mentioned in the Runet, but works stably on firmware versions up to the end of the week. MIUI TV 2.3.65 You will also find step-by-step instructions with photos of the interface, warnings about risks and answers to frequent questions.

1. Types of locks on Xiaomi M1805D1SG and their causes

Before you start unlocking, it is important to determine what type of lock you are facing, and the choice of method and tools depends on it.

• 🔒 Bootloader lock – occurs after a failed firmware or attempt to install custom software. TV does not load beyond the Mi logo or flashes a red indicator.
• 📱 Link to the Mi Account - after resetting to factory settings (Factory Reset), the TV requires entering the login and password of the previous owner (analogue FRP Android-smartphone).
• 🌍 Regional restrictions – the TV is purchased in China or another region and blocks access to Google Play, YouTube or local services (for example, Wink in Russia).
• 🔄 Bootloop – The TV is constantly restarted after being upgraded or reset, often accompanied by an error. E000001-1.
• 🚫 Hardware locking is a rare case where the TV is locked at the chip level (for example, after a failed overclocking attempt or change). EDID).

The most common reasons for blocking:

• 🔧 PAttempt installs firmware from another model (for example, M1804D1SA instead M1805D1SG).
• 🔄 Interrupted air renewal (OTA) through USB.
• 📦 Buying a used TV with a tied Mi Account.
• 🌐 Change the region in the settings without resetting (Settings) → Account & Security → Region).

⚠️ If the TV is making a mistake E000001-1 or E000002-1 When turned on, it indicates damage to the boot or system partition, in which case unlocking through standard methods is impossible - you will need to flash through the boot or system partition. UART (Only for experienced users).

2.Official Unlocking Methods from Xiaomi

Xiaomi provides legal ways to unlock, but they have limitations.

Unlocking through Mi Unlock Tool (bootloader only)

This method is suitable if you have blocked the bootloader after trying to install custom firmware. Important: the Mi Unlock Tool does not officially support TVs, but some versions work with the same software. M1805D1SG bypass.

Algorithm of action:

1. Download the official Mi Unlock Tool (version not newer than 5.5.224.24).
2. Connect the TV to the PC via USB-A → USB-A cable (the port on the TV is usually located on the side).
3. Turn the TV into Fastboot mode: Hardware: press the Menu button on the remote + Power button on the TV for 10 seconds. ADB Execute the adb reboot bootloader command.
4. In the Mi Unlock Tool, log in to the same Mi Account that is linked to the TV.
5. Press Unlock and wait for the process to be completed (can take up to 72 hours due to Xiaomi’s validation).

Successful unlocking is confirmed by the message Unlocked successfully, after which you can sew the TV through the Fastboot.

⚠️ Note: If the TV was purchased in China, the Mi Unlock Tool may refuse to unlock with the Couldn't unlock error.This device is not supported.

2.2 Resetting Mi Account binding via Xiaomi support

If the TV requires the previous owner’s login after the reset, the official way is to contact Xiaomi with proof of purchase.

• 📄 Prepare a check or warranty card with the serial number of the TV (SN You can find it on the back sticker).
• 📧 Write in support on the official website or through Mi Community.
• 🔑 Please indicate that the TV is purchased and the previous owner cannot provide account details.

The timeframe for the request is 3 to 14 days, and if you respond positively, you will be given a binding reset instruction.

3. Unlock through ADB (without data loss)

This method is suitable for de-linking to a Mi Account or circumventing regional restrictions without completely resetting. ADB Debugging (if the TV is still loading) or accessing Recovery.

Instructions:

1. Put the debugging on. ADB: Go to Settings. → On TV. → Version. MIUI TV and 7 times click on the line with the version until the message appears You became a developer. → Additionally. → For developers, activate the debugging by ADB.
2. Connect the TV to your PC and check the connection: Adb devices must display the serial number of the device.
3. To unlink your account, please do adb shell am start. -n com.xiaomi.account/com.xiaomi.account.ui.ResetPasswordActivity This will open a reset window where you can create a new account.
4. Adb shell settings put global region CN # Installs China region (to access all features) adb shell settings put global miui_region CN After the reboot, the TV will consider itself a Chinese model.

If ADB It is turned off and the TV is not loading, try connecting via Recovery:

• Hold the Menu. + Power for 15 seconds to log in to Recovery.
• Connect to the ADB and do: adb sideload update.zip (where update.zip — official firmware for your model).

Download ADB Tools (platform-tools)

Enable debugging on ADB customized

Connect the TV to the PC with the original cable

Check the connection with the adb device command

Download the firmware for your model (M1805D1SG)-->

4. Alternative Unlocking Methods (for Power Users)

If the official methods have not worked, you can use undocumented methods that require more time and skills, but often save in desperate situations.

Unlocking through the service menu (method for M1805D1SG)

This method works due to vulnerabilities in firmware before MIUI TV 2.3.65 You will need a remote from Xiaomi Mi Box (or a universal remote with support for code 1293).

Step-by-step:

1. Turn on the TV and click on the remote from Mi Box combination: Menu → Back up. → Up. → Let's go. → Up. → The service menu (Factory Menu) should be opened).
2. Go to the Advanced Settings section → Clear Data.
3. Select Clear Mi Account and confirm the reset.
4. Restart the TV – the link to the account will be removed.

If you don’t have a Mi Box remote, you can use it. ADB service-menu:

adb shell am start -a android.intent.action.MAIN -n com.android.tv.settings/.device.factory.FactoryResetActivity

⚠️ Warning: After being reset via service menu, the TV may require re-configuration of the region.Select China (CN), Even if you are in a different region, it will open up all the functions.

4.2. Firmware through USB (post-brick recovery")

If the TV is not turned on or stuck on the logo, the firmware will help through the USB. For M1805D1SG Only official firmware with.zip extension (not.img) is suitable!).

Instructions:

1. Download the firmware for M1805D1SG from an official website or a verified source (for example, 4PDA).
2. Unpack the archive and copy the update.zip file to a flash drive formatted in FAT32.
3. Put the flash drive in. USB-TV port (preferably rear, marked) USB 2.0).
4. Press on the Menu remote. + Power for 10 seconds to enter the update mode.
5. Select Update via USB and confirm the installation.

It takes 5-10 minutes, and after the reboot, the TV will be in factory condition.

5. Unlock through UART (last resort)

If the TV is completely "brick" (does not respond to buttons, does not turn on, flashes a red indicator), the only way to restore it is through the firmware. UART-This method requires disassembling the TV and working with a soldering iron, so it is recommended only for experienced users.

What you need:

• 🔧 UART-USB adapter (e.g, CP2102 or CH340).
• 🔌 Solding iron and solder for connecting to contacts on the board.
• 💻 Tera Term or Putty program for working with COM-port.
• 📁 Firmware in.img format for M1805D1SG (not.zip!).

Step-by-step:

1. Take the TV apart and find it. UART-contact on the motherboard (usually signed) TX, RX, GND).
2. Connect the adapter to the contacts: UART → Payment TX → RX RX → TX GND → GND
3. Connect the adapter to the PC and open Tera Term at a speed of 115200 baht.
4. Turn the TV on the network – the U-Boot should appear in the terminal.
5. Stop loading Space keys and enter commands: fastboot flash boot boot.img flash system system.img reset

After successful firmware, the TV should boot up. If not, check the connection correctly. UART or firmware integrity.

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Before disassembling the TV, take a picture of the location of all the plumes and screws, which will help to avoid errors in the assembly and prevent damage to the screen or board.

6. bypassing regional restrictions after unblocking

Even after successful unlocking, the TV can still keep regional restrictions (such as blocking Google Play or YouTube) to remove them:

Method 1: Through settings (without root)

1. Go to Settings → Account and Security → Region.
2. Select China, which will give you access to all the features.
3. Reboot the TV.
4. Go back to the settings and select your region again (e.g., Russia).

Method 2: Through ADB (if the region is blocked)

adb shell settings put global region CN


adb shell settings put global miui_region CN




adb reboot

Method 3: Install the Global Patch ROM (requires an unlocked loader)

• Download the patch. Global_Patch_M1805D1SG.zip (available 4PDA).
• Squeeze it through. TWRP Fastboot: Fastboot Flash System Global_Patch.img
• Perform a reset to factory settings.

7. Frequent errors and their solutions

When unlocking Xiaomi M1805D1SG And users often have typical problems, and these are the most common ones and the ways to solve them:

• 🔴 Mistake. E000001-1 When you're firmware, the bootloader is damaged. boot.img via Fastboot or UART.
• 🔴 TV doesn’t see flash drive in update mode – check format (FAT32) and file name (update.zip). Try another one. USB-port.
• 🔴 ADB not connected – enable debugging in the developer settings or check drivers on PC.
• 🔴 After the reset, the Mi Account requires again - the binding is saved in the persist section. Solution: flash clean firmware through Fastboot.
• 🔴 The TV got stuck on the logo after the firmware was put in, which is an incompatible version of the firmware. M1805D1SG.

If none of the methods worked, check:

• Updates for the Mi Unlock Tool or ADB.

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If the TV doesn't respond to buttons and doesn't turn on, check the power supply first. Often the "brick" is not due to the firmware, but to a malfunction of the capacitors on the board.

FAQ: Answers to Frequent Questions