CIT Xiaomi: What is this mode, why is it needed and how to use it

If you’ve ever come across setting up Xiaomi TVs or smart devices, you might have noticed a mysterious acronym. CIT It's a term that often raises questions about whether it's a hidden feature for developers, a way to unlock additional features, or something that's dangerous to the device. CIT (Customer Inspection Test is a special testing mode that the manufacturer leaves in the firmware for diagnosis and check the operability of the equipment before selling it.

In this article, we will explain in detail what is CIT-Xiaomi mode, for which devices it is relevant (mostly these are Mi TVs) TV, Redmi TV And some smart gadgets, how to turn it on or off, and why the average user might need access to this menu. CIT Factory Mode – it is important not to confuse functions and do not harm the device.

Let us warn you immediately: CIT Some tests can reset or even lock the device if you use them incorrectly, but if you do it correctly, it can diagnose problems with the screen, sound, ports. HDMI Wi-Fi without contacting the service center.

What is it? CIT in Xiaomi devices: decryption and purpose

CIT The customer inspection test is a set of tests that are designed to test a device during manufacturing, transportation or in-store acceptance, unlike Factory Mode, which is used by engineers for deep diagnostics and calibration, CIT-mode is more “user” and allows you to check the basic functions without the risk of damaging the firmware.

For example, in the Xiaomi TVs through the CIT possible:

📺 Check the matrix for broken pixels or backlight.
🔊 Testing of speakers and audio outputs (including: HDMI ARC).
📶 Diagnose Wi-Fi, Bluetooth and Ethernet modules.
🔌 Check the port operation USB and HDMI.
🎮 Make sure the DU remote works correctly.

It is important to understand that CIT — It's not a tool to overclock, unlock, or modify the device, but a diagnostic mode that doesn't allow you to access hidden system settings (unlike the one you're using to do). ADB However, some users use it to reset to factory settings if the standard methods don't work.

⚠️ Attention: Entrance CIT-The standard code is 3368 or 1147, but on new models it may differ.Do not try to pick up a password at random - after 5 unsuccessful attempts, the device will be locked.

What devices Xiaomi has on CIT-regime?

CIT Not available on all of the brand's gadgets, but it's primarily found in:

📺 Mi TVs TV (Series A, E, P, Q, S, Redmi TV (X, A).
🖥️ Xiaomi Mi Desktop Monitor (e.g. 23.8" or 27").
🎧 Some smart speakers (such as Mi Smart Speaker).
📱 Less commonly – in Mi Pad tablets (only in service firmware).

On smartphones Xiaomi, Redmi or POCO CIT-No mode - instead of it, Factory Mode (access via code ##4636## or ##3644633##) is used. CIT s EDL-Emergency Download Mode, which is used to flash the bricks».

To see if your device supports CIT, check:

Press the Menu button (or Settings) on the remote) + Volume Down for 5 seconds.
If there is a menu with a sign CIT Customer Test – The mode is available.
New models (2023–2026) may require a transition through Settings → About the device → Software version (5 times click on the build number).

📊 What kind of Xiaomi device do you have?

Mi TV/Redmi TV

Xiaomi Monitor

Smart speaker

Tablet

Other

How to enter CIT-Mode on the TV Xiaomi: step-by-step instructions

Entry procedure CIT Depending on the TV model and firmware version, below is a one-stop-shop method that works on most Xiaomi and Redmi devices (2018–2026.).

Turn off the TV for 1 minute.

Connect the remote control (preferably the original)

Make sure there are no active system updates

Write down the standard passwords (3368, 1147, 0000)

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Method 1: Through buttons on the remote

Turn on the TV.
Press and hold the Menu buttons at the same time. + Volume Down (on the remote) for 5-7 seconds.
There'll be a menu with a sign. CIT Mode or Factory Menu.
Enter the password (by default 3368 or 1147).

Method 2: Through the settings menu (for new models)

Go to Settings → About TV → The version of the software.
Click the build number 5 times in a row.
In the window that appears, select CIT Test.
Password back.

Method 3: Through ADB (for advanced users)

If the buttons are not working, you can enter the CIT through ADB:

adb shell am start -n com.android.tv.settings/.deviceinfo.CitActivity

To do this, you need to turn on the debugging USB developer-setting.

⚠️ Note: On Xiaomi TVs with firmware MIUI TV 3.0+ (2023–2026) Entrance to CIT This can be blocked, and you will need a service cable or unlock via Fastboot.

Main tests in CIT-mode: what can be checked?

After entering the CIT You'll see a menu with a few tabs, and the layout varies, but the following tests are usually available:

Test	Appointment	How to use
Panel Test	Checking the matrix for broken pixels, backlight, color reproduction.	Displays single-color screensavers (red, green, blue, black, white).
Audio Test	Diagnostics of speakers, audio output HDMI ARC, 3.5 mm connector.	Plays test sounds on each channel.
Key Test	Check buttons on the remote and TV.	When you press the button, its code is displayed on the screen.
Wi-Fi/BT Test	Testing of wireless communication modules.	Scanning the networks, checking the connection.
Reset	Resetting to factory settings.	Be careful – it deletes all data!

Example of use: If you have a Xiaomi Mi on your TV screen TV P1 You have vertical bands, you run Panel Test, and you check if they're still on a single color background, if they're, there's a problem with the matrix or the plume, if they're not, it's the firmware or the settings.

What to do if the test showed an error?

If CIT Failures are detected (for example, it does not work) HDMI-port or speaker), write down the error code (displayed at the bottom of the screen) and contact the service center. Some problems (for example, reset audio settings) can be fixed yourself through Reset Audio in the menu CIT, But the physical breakdowns need repair.

Differences CIT from Factory Mode and EDL: more dangerous?

Many users are confused CIT And we're going to look at the key differences:

🔧 CIT (Customer Inspection Test: Safe mode for basic diagnostics, no firmware, no special knowledge required.
🏭 Factory Mode is an engineering menu for calibration and repair, where you can damage the device (for example, knock down the color reproduction settings).
🚨 EDL (Emergency Download Mode: Emergency Flash Mode, used when the TV is not on, requires special software (Mi Flash Tool).

When should I use what regimen?

🔍 Want to check the screen or sound? → CIT.
🔧 You need to calibrate the color or reset it. EEPROM → Factory Mode.
💥 The TV is not turned on ("brick») → EDL.

⚠️ Note: Signing into Factory Mode on Xiaomi TVs may result in a loss of warranty if you change service settings (e.g. Backlight or Gamma). CIT There's no risk.

💡

If you accidentally logged in to Factory Mode, do not change settings with unknown names (e.g, DDIC or TPCON). Exit the Exit button or turn off the TV from the outlet.

Can we do this? CIT unlock?

No, CIT-The mode is not designed to unlock additional features. It doesn't give access to the mode:

🎮 Games or applications hidden in the firmware.
📶 Alternative Wi-Fi frequencies (e.g. 6 GHz).
🔊 Additional audio codecs (Dolby Atmos, DTS:X).
📺 Emulation modes (e.g. Game Mode)+ non-player).

However, through CIT possible:

✅ Reset to factory settings if standard reset doesn't work.
✅ Check the actual screen resolution (sometimes different from the stated screen resolution).
✅ Find out the serial number and version of the hardware platform (useful for firmware search).

Myth: There are instructions on the Internet that CIT You can turn on Root or you can install custom firmware. It's a lie -- you need a Fastboot or something. EDL, and also unlocked loader.

💡

CIT — It's a diagnostic tool, not a device modification tool. If you want hidden features, look for alternative firmware (like LineageOS for example). TV), Be aware of the risk of loss of warranty.

Risks and Warnings When Working with CIT

Thought CIT-The regime is considered safe, there are several points that can lead to problems:

Reset: Reset option in the menu CIT deletes all data, including accounts and installed applications.
Password Blocking: On New Models After 3 Failed Password Attempts CIT Unlocking is only possible through the service center.
False errors: Some tests (such as the Wi-Fi Test) may show errors due to temporary failures.
Firmware incompatibility: If you upgraded your TV to the latest version MIUI TV, and then went in CIT, Some tests may not work correctly.

What to do if after CIT The TV was not working smoothly?

🔄 Perform reset through Settings → System system → Reset.
📥 Update the firmware to the latest version.
📞 If the problem persists, contact Xiaomi with the error code. CIT.

⚠️ Note: On Xiaomi TVs with Google TV (Like Mi. TV Q2 2026) entrance CIT This could cause Google services to crash, and you'll need to reinstall the firmware through Fastboot.

FAQ: Frequent questions about CIT Xiaomi

Can we do this? CIT Include Dolby Vision on uncertified models?

No, CIT It doesn't run Dolby Vision support, and it's hard-coded in the firmware, and it depends on the hardware platform. TV A55), Dolby Vision can only be enabled through custom firmware, but it will deprive you of the guarantee.

How to get out CIT-The TV is still on when the TV is down?

If the TV doesn't respond to the buttons after the tests, try: Press and hold the power button on the remote for 10 seconds. Pull the power cord out of the socket for 1 minute. If it doesn't work, press the Source button. + Volume Down for 15 seconds on 2023 models+ a year may be required to be discharged through ADB: adb shell reboot

Why in the CIT test HDMI?

This is a common problem on Xiaomi TVs with ports. HDMI Causes: 🔌 Port is physically damaged (check contacts). 📥 Outdated firmware (update through) OTA). 🔧 In the settings HDMI switched on ARC or CEC — Turn them off before the test. If the test doesn't start anyway, try plugging in the device (like a set-top box) and manually check the port.

Can we do this? CIT Find out the real time of TV production?

Yes, in some versions. CIT There's a tab called Usage Time or Panel Hours that shows the number of hours a matrix is running, and this information is useful when you buy a used TV -- if it's more than 30,000 hours, you're more likely to burn out the backlights, and new models (2023-2026) can hide that data. The alternative is to use ADB-Adb shell dumpsys power

Will the discharge be through CIT remove firmware updates?

No, dumping through CIT (Reset option only deletes user data and settings, but does not roll back the version MIUI TV. The firmware will remain the same as before the reset, but if you log in after the reset and manually select to roll back the update, the system will prompt you to return the previous version (if it is stored in memory).