How to Use the Hidden CIT Menu on Xiaomi Phone to Test Hardware

CIT (Control and Identification) menu is a built-in hardware diagnostic tool that most Xiaomi users never know exists. It lets you test nearly every component on your phone — screen, speakers, cameras, sensors — in minutes, and it requires no root or third-party app.

What Is the CIT Menu?

CIT stands for Control and Identification Test. It is a factory-level test interface baked into all Xiaomi and HyperOS devices. Engineers use it to verify hardware before shipment, but you can use it to diagnose issues yourself.

How to Open the CIT Menu (Two Methods)

Method 1 – Dial Code (fastest)
1. Open the Phone app (dialer).
2. Type: *#*#6484#*#*
3. The CIT menu launches automatically — no need to press call.

On some models the code is *#*#64663#*#*. Try both if the first does not work.

Method 2 – Through Settings
1. Go to Settings → About phone → Detailed info and specs.
2. Tap the Kernel version line 4 times rapidly.
3. CIT menu opens.

What Can You Test?

Test Category	What It Checks
Display	Dead pixels, touch response, colour uniformity
Audio	Earpiece, main speaker, microphone, headphone jack
Cameras	Front & rear camera, flash, zoom
Sensors	Accelerometer, gyroscope, compass, proximity, fingerprint
Connectivity	Wi-Fi, Bluetooth, NFC, GPS
Hardware keys	Volume, power, capacitive buttons

How to Run a Test

1. Tap any item in the list (e.g. Speaker).
2. Follow the on-screen prompt — most tests are one-tap.
3. After each test you will see PASS (green) or FAIL (red).
4. A FAIL result confirms the component is faulty — useful before contacting a service centre.

Pro Tips

Before a repair visit: Run all relevant CIT tests and screenshot the results. This saves time at the service centre and prevents disputes about pre-existing damage.
Second-hand purchase: Run CIT the moment you receive a used Xiaomi phone to verify every component works.
Sensor calibration: CIT includes an accelerometer and compass re-calibration option — handy if your maps or games behave erratically.
Data safety: CIT never deletes your data. It only reads hardware status.

If the CIT menu shows a hardware failure and the device is still under warranty, book a repair through the official Xiaomi Service Centre portal (mi.com/support). For software-related issues that survive a factory reset, tools like Dr.Fone – System Repair can reflash the firmware without erasing data.

Summary

The CIT menu is one of the most powerful and overlooked tools on any Xiaomi phone. Bookmark the dial code *#*#6484#*#* — it could save you time, money, and an unnecessary trip to a repair shop.